Filed Pursuant to Rule 424(b)(3)
                                      Registration Nos. 333-26627 and 333-101209

PROSPECTUS

                           ALLIANT ENERGY CORPORATION
                             SHAREOWNER DIRECT PLAN

                         426,835 SHARES OF COMMON STOCK

     We are offering participation in our Shareowner Direct Plan. The plan
provides you with a variety of options, including:

     o    automatic reinvestment of all or a portion of your cash dividends paid
          on shares of our common stock in additional shares of our common
          stock;

     o    the ability for persons who are not shareowners to purchase their
          initial shares of our common stock;

     o    a means of purchasing additional shares of our common stock by making
          optional cash investments of up to $120,000 per calendar year,
          including any initial investment;

     o    a free custodial service for depositing your common stock certificates
          with the administrator of the plan for safekeeping;

     o    the ability to transfer or make gifts of your shares of our common
          stock at no charge; and

     o    the ability to sell your shares of our common stock through the plan.

     The plan provides that shares of our common stock may be purchased for
participants from us or in the open market or in privately negotiated
transactions. The price of shares of common stock purchased under the plan will
be either:

     o    the average of the high and low sale price of shares of our common
          stock as reported on the New York Stock Exchange on the date of
          purchase if newly issued shares are purchased from us, or

     o    the weighted average of the price paid for shares of our common stock
          if purchased on the open market or in privately negotiated
          transactions.

No brokerage commissions, fees or service charges are charged to you in
connection with purchases of shares under the plan or for participating in the
plan.

     Our common stock is listed on the New York Stock Exchange under the symbol
"LNT." The closing price of our common stock on November 18, 2002 on the New
York Stock Exchange was $14.47 per share.

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.

                              ____________________

                The date of this prospectus is November 19, 2002.


                                TABLE OF CONTENTS

                                                                            Page

The Company...................................................................3
Use of Proceeds...............................................................3
Summary of Plan Features......................................................3
The Plan......................................................................4
     Purpose..................................................................4
     Plan Administration......................................................4
     Enrollment Procedures....................................................4
     Transfer of Shares from Street Name......................................5
     Initial Investments and Optional Cash Investments........................5
     Methods of Investment....................................................6
     Dividend Reinvestment Options............................................7
     Purchase of Common Stock.................................................8
     Price to Participants....................................................8
     Sale of Common Stock.....................................................9
     Custody of Stock and Issuance of Stock Certificates......................9
     Share Safekeeping........................................................9
     Gift/Transfer of Shares Held in the Plan................................10
     Withdrawal and Termination..............................................10
     Stock Splits, Stock Dividends and Rights Offerings......................11
     Voting Rights...........................................................11
     Statements and Reports..................................................11
     No Right to Draw Against Account........................................11
     Duties and Responsibilities.............................................11
     Change or Termination of the Plan.......................................12
     Our Termination of an Account...........................................12
     Interpretation of the Plan..............................................12
     Governing Law...........................................................12
Federal Income Tax Consequences..............................................12
     General Considerations..................................................12
     Tax Withholding.........................................................13
Rights to Purchase Common Stock..............................................13
Legal Matters................................................................14
Experts......................................................................14
Where You Can Find More Information..........................................15
                         ______________________________

     You should rely only on the information contained or incorporated by
reference in this prospectus. We have not authorized any other person to provide
you with different information. If anyone provides you with different or
inconsistent information, you should not rely on it. We are not making an offer
to sell these securities in any jurisdiction where the offer or sale is not
permitted. You should assume that the information appearing in this prospectus
and the documents incorporated by reference is accurate only as of the
respective dates of those documents in which the information is contained. Our
business, financial condition, results or operations and prospects may have
changed since those dates.
                         _______________________________

     Unless we otherwise indicate or unless the context requires otherwise, all
references in this prospectus to "we," "our," "us" or similar references mean
Alliant Energy Corporation.


                                       2


                                   THE COMPANY

     We are a diversified energy-services provider engaged primarily in
regulated utility operations in both the Midwest and internationally. We also
have significant non-regulated domestic and international operations. Through
our subsidiaries and partners, we provide electric, natural gas, water and steam
services to our over three million customers worldwide. Our domestic regulated
public utility subsidiaries, Interstate Power and Light Company and Wisconsin
Power and Light Company, operate in Iowa, Wisconsin, Illinois and Minnesota.
Alliant Energy Resources, Inc., our non-regulated subsidiary, has energy-related
operations and investments throughout the United States as well as in Australia,
Brazil, China, Mexico and New Zealand.

     Our principal executive office is located at 4902 North Biltmore Lane,
Madison, Wisconsin 53718, and our telephone number is (608) 458-3311.

                                 USE OF PROCEEDS

     We have no basis for estimating either the number of authorized but
unissued shares of common stock that we will ultimately sell pursuant to the
plan or the prices at which we will sell the shares. Any net proceeds we receive
from the sale of shares under the plan will be added to our general funds and
used for general corporate purposes. We will not receive any proceeds from the
sale of shares under the plan that are acquired on the open market or in
privately negotiated transactions.

                            SUMMARY OF PLAN FEATURES

     Some of the features of the plan, which are described in greater detail
under "The Plan" below, are:

     o    If you do not presently own shares of common stock, then you may
          become a plan participant, assuming some qualifications are met, by
          completing an authorization form and making an initial cash investment
          of not less than the amount specified on the authorization form nor
          more than $120,000.

     o    If you participate in the plan, then you may acquire additional shares
          of common stock by making optional cash investments in amounts not
          less than $25 per investment nor more than $120,000 per calendar year,
          including any initial investment. The investment amount can be
          automatically deducted from your bank account or it can be submitted
          by mail.

     o    If you participate in the plan and are our employee or an employee of
          one of our subsidiaries, then you may also acquire additional shares
          of common stock by making optional cash investments through payroll
          deductions. The minimum deduction per pay period is the amount
          specified on the payroll withholding form. You may not make optional
          cash investments through payroll deductions of more than $120,000 per
          calendar year, including any initial investment and any optional cash
          investments made by means other than payroll deduction.

     o    If you participate in the plan, then you may acquire additional shares
          of common stock automatically by reinvesting all or a portion of your
          cash dividends paid on shares of common stock you then own.

     o    If you participate in the plan, then you may deposit your common stock
          certificates, at no cost, with the plan administrator for safekeeping.

     o    If you participate in the plan, then you may have your cash dividends
          electronically deposited into your checking or savings account.

     o    If you participate in the plan, then you may sell your shares of
          common stock held by the plan through the plan administrator.

                                       3


     o    Dividends are calculated on all full and fractional shares of common
          stock in the plan.

     o    Personal record keeping is simplified by our issuance of statements
          indicating account activity. YOU SHOULD RETAIN THESE STATEMENTS FOR
          TAX PURPOSES.

     o    If you participate in the plan, then you may transfer or make gifts of
          shares of common stock at no charge.

                                    THE PLAN

     The following are the terms and conditions of the plan.

Purpose

     The purpose of the plan is twofold. First, the plan provides our
shareowners of record, other investors who choose to become shareowners of
record and our employees and the employees of our subsidiaries with a simple,
convenient and economical method to purchase shares of common stock and to
reinvest all or a portion of their cash dividends in additional shares of common
stock. Second, the plan provides us with the ability to sell our authorized but
unissued shares of common stock to participants in the plan, which will raise
funds to increase our equity base for general corporate purposes.

Plan Administration

     Through our Shareowner Services Department, the administrator of the plan,
we administer the plan, keep records, send statements of account activity to
participants and perform clerical and ministerial duties related to the plan. An
independent agent, which is not an affiliate of ours, designated by the
administrator will make purchases and sales of shares of common stock for the
plan in the open market or in privately negotiated transactions. Subject to
applicable securities laws and some limitations, the independent agent will have
full discretion as to the timing of, and all matters relating to, purchases and
sales of shares of common stock for the plan other than for the purchase from us
of authorized but unissued shares.

     The administrator will establish and maintain a separate account under the
plan for each participant. We will credit to your account all shares of common
stock, including any fractional shares, computed to four decimal places,
purchased for a participant under the plan, and any shares a participant
deposits through the plan's share safekeeping service.

     You should direct all inquiries and instructions concerning the plan to:

         Alliant Energy Shareowner Services
         P.O. Box 2568
         Madison, WI 53701-2568
         Telephone:        (608) 458-3110
                           (800) 356-5343
         Fax:              (608) 458-3321
         Internet:         www.alliantenergy.com

     All correspondence should include your shareowner account number, taxpayer
identification or social security number and daytime telephone number where you
may be contacted during normal working hours to facilitate a prompt response.

Enrollment Procedures

     Shareowners

     If you are currently a shareowner of record, then you may enroll in the
plan at any time by completing and returning an authorization form to the
administrator. You should direct requests for authorization forms to the
administrator, either by telephone, in writing or through the internet.

     "Street Name" Holders

     If you own shares of common stock that are held on your behalf by a bank,
broker, trustee or other agent, then you may enroll in the plan by registering
one or more shares of common stock directly in your name and by returning a
completed


                                       4


authorization form to the administrator. See "Transfer of Shares from
Street Name."

     Non-Shareowners

     With limited exceptions described below, if you are not currently a
shareowner of record, then you may enroll in the plan by completing and
returning an authorization form to the administrator together with an initial
investment of at least $250, but not more than $120,000, or by authorizing
automatic monthly withdrawals ("automatic investments") of at least $25, in
either case which will be used to purchase shares of common stock for your plan
account. See "Initial Investments and Optional Cash Investments" and "Methods of
Investment."

     Employees

     With limited exceptions described below, any of our employees or employees
of our subsidiaries may enroll in the plan at any time by completing and
returning an authorization form to the administrator or by enrolling in the same
manner as any other eligible investor described above.

     Exceptions

     We reserve the right to prohibit participation in the plan by
non-shareowners who reside in a state where participation in the plan by
non-shareowners who reside in the state would require us to take special action
under the securities or "blue sky" laws of the state and we have not yet taken
the required action. We also reserve the right to prohibit participation in the
plan by any investor, whether or not a holder of record of shares of common
stock, who is a citizen or resident of a country other than the United States,
if his or her participation would violate local laws and regulations applicable
to us or the prospective participant. In any such case, the administrator will
return any authorization form and initial investment tendered by any
non-shareowner who resides in such state or country.

     General

     We will process authorization forms as promptly as practicable.
Participation in the plan will begin after the administrator has reviewed and
accepted a properly completed form.

Transfer of Shares From Street Name

     If you are a beneficial owner of common stock whose shares are registered
in the name of a bank, broker, trustee or other agent, then you may participate
in the plan with respect to these shares by either:

     o    transferring the shares to a plan account by directing your agent (for
          example, your bank, broker or trustee) to register the shares directly
          in your name and having the agent deliver a certificate to you, or

     o    instructing your agent to transfer the shares to the administrator to
          be deposited into the plan for "share safekeeping" for credit to your
          plan account. See "Share Safekeeping."

Initial Investments and Optional Cash Investments

     If you are not currently a shareowner of record, then you must make an
initial investment of at least $250, but not more than $120,000, in the form of
a personal check or money order, automatic investment of at least $25 or, for
employees, payroll deduction of at least the amount specified on the payroll
withholding form, and you must include your initial investment with the
completed authorization form you return to the administrator. See "Methods of
Investment."

     Once you are enrolled in the plan, you may purchase additional shares of
common stock using the plan's optional cash investment feature. You must make
optional cash investments in amounts of not less than $25 per investment and may
not aggregate more than $120,000 per calendar year, including any initial
investment, whether by check or automatic investment. We will not waive these

                                       5


restrictions; however, the $25 minimum is not applicable to employee
participants who make investments through payroll deductions. You have no
obligation to make an optional cash investment at any time, and the amount of
your investments may vary from time to time.

     The administrator must receive authorization forms, which are subject to
our review, with initial investments at least five business days prior to the
next investment date (as defined under "Purchase of Common Stock"). The
administrator will invest initial investments and optional cash investments on
the next investment date, provided the administrator receives such investments
at least five business days prior to that investment date.

     We will not pay interest on any initial investments or optional cash
investments received and held for investment under the plan. Therefore, it is to
your benefit to mail an initial investment or an optional cash investment so
that the administrator receives it shortly, but not less than five business
days, before an investment date. To receive dividends, the administrator must
have received and invested an initial investment or an optional cash investment
on the investment date prior to the dividend record date.

     Upon written request, we will refund your initial investment or any
optional cash investment, provided we receive your request at least two business
days prior to the investment date following receipt of your investment. However,
we will not make a refund until we actually receive the funds.

Methods of Investment

     Your total annual investment cannot exceed $120,000 per calendar year and
must be made in U.S. dollars. For the purpose of applying this limit, all
investments during any calendar year, including initial and optional cash
investments, but excluding dividend reinvestments and deposits of shares in the
plan's share safekeeping service, are aggregated. We will not pay any interest
on amounts we hold pending investment.

     Check Investment

     You may make initial investments and optional cash investments by personal
check or money order payable to "Alliant Energy." Initial investments are
subject to our collection for the full face value in U.S. funds.

     If a check is returned unpaid for any reason, then we will consider the
request for investment of these funds null and void. If any shares have been
purchased with these funds, then the administrator will be entitled to remove
those shares from the participant's account and sell those shares to satisfy the
balance of the uncollected funds. If the net proceeds from the sale are
insufficient to cover this balance, then we will, in addition to any other
rights we may have, be entitled to sell any additional shares from your account
that may be necessary to satisfy the uncollected balance.

     Automatic Investment

     You may make automatic monthly investments, whether initial or optional
cash investments, of at least $25 by electronic funds transfer from a
predesignated account with a U.S. financial institution. To initiate automatic
investments, you must complete and return to the administrator an automatic
investment form and an authorization form, as well as deliver to the
administrator a voided blank check or a savings deposit slip for the account
from which funds are to be drawn. You may obtain automatic investment forms from
the administrator. Automatic investments will be initiated as promptly as
practicable. Funds then will be drawn from your designated account on the tenth
day of each month, or, if the tenth day falls on a weekend or bank holiday, the
first business day thereafter, and will be invested in common stock on the next
investment date.

     You may change the amount of your future automatic investments by
completing and submitting to the administrator a new automatic investment form.
You may terminate your automatic investments by notifying the administrator by
phone, in writing or through the internet. To be effective with respect to the
next


                                       6


automatic investment date, the administrator must receive the new form or notice
at least six business days preceding that date.

     Electronic direct deposit of cash dividends that you elect to receive also
is available through the plan.

     Payroll Deductions

     Our employees or employees of our subsidiaries may also make investments,
whether initial or optional cash investments, by means of payroll deduction, and
the $250 and $25 minimums for initial investment and optional cash investments,
respectively, will not apply to investments made through payroll deductions. To
initiate payroll deductions, the employee must complete and return to the
administrator a payroll withholding form and an authorization form.

     The payroll withholding form, which allows participating employees to
decide the dollar amount to be deducted from their paychecks for each pay
period, will become effective as promptly as practicable. Deductions will be
used to purchase full and fractional, computed to four decimal places, shares of
common stock on the next investment date. The minimum deduction per pay period
is the amount specified on the payroll withholding form.

     Payroll deduction authorizations will remain in effect until cancelled or
modified by the employee, which a participating employee may accomplish by
completing and returning a new payroll withholding form indicating the change
desired. To be effective with respect to the next payroll deduction, the
administrator must receive the new payroll withholding form at least six
business days preceding that date.

Dividend Reinvestment Options

     The authorization form allows you to choose a reinvestment option for
participation in the plan. If you do not specify otherwise, then your account
will be enrolled for full dividend reinvestment. By choosing the appropriate
box, you may select:

Full Dividend           Reinvest all cash dividends on all certificated shares
Reinvestment->          held by you and on all shares credited to your plan
                        account. You may make optional cash investments at any
                        time as described in this prospectus.

Partial Dividend        Receive cash dividends on a specified number of
Reinvestment->          your shares of common stock and reinvest the cash
                        dividends on the remainder of your shares. The shares
                        you specify to receive cash dividends may consist of a
                        combination of certificated shares and shares credited
                        to your plan account. You may elect to have cash
                        dividend payments not reinvested paid by check or
                        through electronic direct deposit. You may make optional
                        cash investments at any time as described in this
                        prospectus.

Optional Cash           Receive cash dividends on all of your shares of common
Purchases Only->        stock, including both certificated shares held by you
                        and shares held by the plan and credited to your plan
                        account. You may make optional cash investments at any
                        time.

     If you participate in the plan's full or partial dividend reinvestment
option, then reinvestment will commence with the first dividend payable after
the dividend record date following your enrollment. We will publicly announce
dividend record dates.

     If you wish to change your method of participation, then you must obtain
and complete a new authorization form and send it to the administrator. To be
effective with respect to a particular common stock dividend, the administrator
must receive the new authorization form at least two business days before the
record


                                       7


date for the dividend. If you elect to cease the reinvestment of your dividends,
then you may receive them by check or electronic direct deposit. You may also
continue to have the administrator hold your shares through the share
safekeeping service, buy shares with optional cash investments, and sell or
transfer the shares as you desire. See "Share Safekeeping," "Initial Investments
and Optional Cash Investments," "Sale of Common Stock" and "Gift/Transfer of
Shares Held in the Plan."

     On each applicable investment date, we will promptly, after deducting
withholding taxes, if any, combine and pay over to the administrator all cash
dividends payable on shares held by the administrator for all participants who
are reinvesting their dividends in the plan. The administrator will apply the
dividends to the purchase of shares of common stock. The administrator will
credit the proportionate number of shares, computed to four decimal places,
purchased by the administrator to your account.

Purchase of Common Stock

     Reinvested common stock dividends, initial investments, optional cash
investments and proceeds, which will be treated regardless of the amount as
optional cash purchases, from the sale or redemption of common stock
subscription or other rights, if any, received by the administrator on behalf of
participants will be used to acquire either outstanding shares of common stock
or authorized but unissued shares of common stock from us, provided that we are
willing to sell the common stock. Purchases of outstanding shares of common
stock on behalf of plan participants may be made on any stock exchange in the
U.S. where our common stock is traded, in the over-the-counter market or by
privately negotiated transactions on terms that the independent agent for the
administrator may reasonably determine at the time of purchase. Any shares
purchased from us will be made in accordance with applicable requirements.

     The administrator and its designated independent agent may combine your
funds with those of other participants for the purpose of purchasing shares.
Neither we nor any affiliated purchasers will exercise any direct or indirect
control or influence over the times when, or prices at which, the designated
independent agent may purchase common stock for the plan or the amount of shares
the designated independent agent may purchase.

     Purchases of shares of common stock under the plan will be made on or about
the following applicable "investment dates":

     o    Each dividend payment date is an investment date for the reinvestment
          of cash dividends.

     o    The 15th day of each month, or the next business day if the 15th falls
          on a weekend or holiday, is an investment date for initial investments
          and optional cash investments.

     Purchases may be made over a period of several days in the case of open
market purchases. All open market purchases will be aggregated for the
investment date.

     For a number of reasons, including observance of the rules and regulations
of the Securities and Exchange Commission or other regulatory agencies requiring
temporary curtailment or suspension of purchases, the investment of all or part
of the funds available in your account may be delayed from time to time. We will
not pay any interest on funds we hold pending investment. However, shares of
common stock will either be purchased within 35 days of receipt of initial
investments or optional cash investments or funds will be returned to you.

     We will credit your account with that number of shares of common stock,
including any fractional shares, computed to four decimal places, equal to the
total amount to be invested divided by the applicable purchase price per share.

Price to Participants

     The price of newly-issued shares of common stock purchased from us for
participants will be the average, computed to four decimal places, of the


                                       8


high and low sale prices of shares of common stock as reported on the New York
Stock Exchange on the applicable investment date. If no trading occurs on the
New York Stock Exchange in the common stock on the applicable investment date,
then the price will be determined with reference to the next preceding date on
which the common stock is traded on the New York Stock Exchange. The price of
shares of common stock purchased for participants on the open market or in
privately negotiated transactions will be the weighted average price of all the
shares purchased for the applicable investment date. If an investment under the
plan is at any time made in both newly-issued and already outstanding shares,
then the shares purchased will be allocated as proportionately as is practicable
among the accounts of all participants for whom funds are being invested at that
time.

     Under the plan, you do not have the ability to order the purchase of a
specific number of shares, purchase of shares at a specified price or a
particular date of purchase, as could be done with respect to purchases through
a broker.

Sale of Common Stock

     You can sell all or part of your shares held in your plan account by
providing the administrator with written instructions, signed by all registered
holders. You cannot sell any certificated shares that you may be holding unless
you first deposit them with the administrator pursuant to the plan's share
safekeeping service.

     Your sales will be made as soon as practicable after the administrator
receives written instructions from you. Requests to sell plan shares will be
aggregated and processed within ten business days by an independent broker,
which is not an affiliate of ours, designated by the administrator on the open
market at prevailing market prices. When you sell your shares, the price per
share that you will receive will be the average of the proceeds from all shares
sold by the administrator, less your proportionate share of the brokerage
commission, transfer taxes, if any, and withholding tax, if any.

     You are required to maintain a balance of one or more full shares of common
stock or we may terminate your plan account. We will treat a request to sell all
shares held in your account as a withdrawal from the plan. See "Our Termination
of an Account" and "Withdrawal and Termination."

Custody of Stock and Issuance of Stock Certificates

     The administrator will hold all shares purchased on your behalf through the
plan in safekeeping in our name or the name of our nominee. However, you may at
any time and without charge, obtain a certificate for all or part of the whole
shares credited to your plan account by making a request in writing to the
administrator. We will not issue any certificates for fractional shares.
Obtaining certificates for your plan account shares in no way affects dividend
reinvestment. See "Dividend Reinvestment Options."

Share Safekeeping

     The plan's "share safekeeping" service allows you to deposit common stock
certificates held by you with the administrator for safekeeping. The advantages
of the share safekeeping service are:

     o    The risk associated with the loss of your stock certificate(s) is
          eliminated. If your certificates are lost or stolen, then you cannot
          sell or transfer your shares without first obtaining replacement
          certificates. This process of replacing lost certificates could take
          several weeks and will result in cost and paperwork, both for you and
          for us.

     o    Certificates deposited with the administrator will be transferred into
          our name or the name of our nominee and credited to your account under
          the plan. The shares then will be treated in the same manner as shares
          purchased through the plan, and you may conveniently and efficiently
          sell or transfer those shares


                                       9


          through the plan. See "Sale of Common Stock," "Gift/Transfer of Shares
          Held in the Plan" and "Withdrawal and Termination."

     o    You have all plan options available to you, including full or partial
          reinvestment and/or receiving dividends by check or electronic
          deposit.

     To participate in the plan's share safekeeping service, you must complete
and return an authorization form, along with the common stock certificates you
wish to deposit, to the administrator by registered and insured mail. You should
not endorse the certificates or complete the assignment section. You may obtain
an authorization form by calling or writing the administrator. If you have lost
any of your certificates, then you must replace them before you may participate
in the share safekeeping service.

Gift/Transfer of Shares Held in the Plan

     You may transfer the ownership of some or all of your plan shares,
including shares held in safekeeping, by mailing to the administrator a properly
executed stock assignment form, which you may obtain from the administrator or a
financial institution, with a Medallion Signature Guarantee for all owners and a
letter of instruction. A Medallion Signature Guarantee is a signature guarantee
by an institution such as a commercial bank, trust company, securities
broker/dealer, credit union or a saving institution participating in a Medallion
Program approved by the Securities Transfer Association, Inc. You may transfer
shares to new or existing shareowners.

     Unless otherwise instructed, the administrator will retain the shares and
enroll the transferee in full dividend reinvestment, provided the transferee is
eligible to participate. The new participant will receive a statement showing
the number of shares transferred and now held in his or her plan account, which
will be considered the transaction confirmation.

Withdrawal and Termination

     You may withdraw from the plan at any time by giving written notice to the
administrator. If you terminate participation in the plan, all reinvestment of
your dividends will immediately stop if the notice of withdrawal is received by
the administrator not later than ten business days prior to the record date for
the next dividend payment. Investment of optional cash will stop immediately if
notification of withdrawal from the plan is received by the administrator at
least two business days prior to the applicable investment date. The entire
amount of any optional cash received for which investment has been stopped by
termination of participation in the plan will be refunded to you without
interest.

     Upon withdrawal from the plan, you or your personal representative or other
authorized agent may elect to either receive a certificate for the number of
whole shares held in your account and a check for the value of any fractional
share, or sell all shares in your account as described under "Sale of Common
Stock."

     If you terminate participation in the plan, then you will receive a check
for the cash value of any fractional share held in your plan accounts. Fractions
of shares will be valued at the then current market price, determined in the
same manner as provided with respect to the sale of whole shares, less brokerage
commissions, transfer taxes and withholding taxes, if any.

     You may not make any optional cash investments after you have terminated
participation in the plan unless and until you rejoin the plan, which you may
accomplish by complying with the enrollment procedures. See "Enrollment
Procedures." However, we reserve the right to reject any authorization form from
a previous participant on grounds of excessive joining and termination. Such
reservation is intended to minimize administrative expense and to encourage use
of the plan as a long-term investment service.


                                       10


Stock Splits, Stock Dividends and Rights Offerings

     We will credit to your account any shares distributed pursuant to stock
dividends or stock splits effected by us on shares held by the administrator for
you. If we make available to holders of our common stock subscription or other
rights to purchase additional shares of common stock or other securities, then
the administrator will, if and when the rights trade independently, sell the
rights accruing to all shares held by the administrator for the participants and
will apply the net proceeds of the sale to the purchase of common stock.
However, we will, in advance of a subscription offer, or, if the rights may not
be independently traded upon issuance, prior to the date on which the rights
trade independently, inform you that if you do not want the administrator to
sell your rights and invest the proceeds, then it will be necessary for you to
transfer all full shares held under the plan to your own name by a given date.
This would permit you to exercise, transfer or sell the rights on the shares. If
rights issued by us are redeemed prior to the date that the rights trade
independently, then the administrator will invest the resultant funds in
additional shares of common stock.

Voting Rights

     The administrator will vote at shareowners' meetings any full shares of
common stock credited to your account under the plan in accordance with your
instructions. The administrator will not vote such shares if you do not give any
instructions. A proxy card will be mailed to you representing the shares of
common stock held in your plan account.

Statements and Reports

     You will receive quarterly statements showing all transactions in your
account for that quarter, including the amount invested, the price paid per
share, the number of shares purchased and total shares accumulated. You should
retain these statements for purposes of establishing the cost basis of shares
purchased under the plan for income tax and other purposes.

     The administrator will also send you an account statement as soon as
practicable after each initial investment, optional cash investment, sale or
transfer.

     In addition, you will receive copies of the same communications we send to
all other holders of common stock, including our annual reports, notices of
annual meetings and proxy statements, and information you need for reporting
dividend income for Federal income tax purposes.

     All notices, statements and reports to you will be addressed to you at your
last address we have on record. Therefore, you must promptly notify us by phone,
in writing or through the internet of any change of address.

No Right to Draw Against Account

     You will not have a right to draw checks or drafts against your account or
give instructions to the administrator with respect to any shares or cash held
therein, except as expressly provided in this prospectus.

Duties and Responsibilities

     Neither we nor any of our agents will have any responsibility beyond the
exercise of ordinary care for any action taken or omitted pursuant to the plan,
nor will we have any duties, responsibilities or liabilities, except as
expressly set forth in this prospectus. Neither we nor any of our agents will be
liable under the plan for any act done in good faith or for any good faith
omission to act, including any claims of liability with respect to the prices at
which shares are purchased or sold for your account, the times when the
purchases or sales are made or any inability to purchase or sell shares, for any
fluctuation in the market value after purchase or sale of shares, or arising out
of failure to terminate your account upon your death prior to receipt of notice
in writing of your death.

     You should recognize that we cannot provide any assurance of profit or
protection against loss on any shares purchased under the plan.

                                       11


Change or Termination of the Plan

     We reserve the right to amend, modify, suspend or terminate the plan in
whole, in part, or with respect to participants in one or more jurisdictions. We
will send notice of any suspension, termination or significant amendment, or
modification of the plan to all affected participants. No such event will affect
any shares then credited to a participant's account. Upon any whole or partial
termination of the plan by us, a certificate for whole shares credited to an
affected participant's account under the plan will be issued to the participant
and a cash payment will be made for any fraction of a share. Fractions of shares
will be valued at the then current market price, determined in the same manner
as provided with respect to the sale of whole shares, less brokerage
commissions, transfer taxes and withholding tax, if any. Any uninvested funds
held by the administrator at the time of any suspension or termination of the
plan will be remitted by the administrator to affected participants.

Our Termination of an Account

     We may terminate your enrollment in the plan if you no longer hold any
shares of record and your plan shares total less than one whole share of common
stock. At our discretion we may also terminate your participation in the plan
upon written notice mailed to you at the address appearing on our records. Upon
termination, you will receive a certificate for whole shares held in your
account and a check for the value of any fractional share held in your plan
account. Fractions of shares will be valued at the then current market price,
determined in the same manner as provided with respect to the sale of whole
shares, less brokerage commissions, transfer taxes and withholding tax, if any.

Interpretation of the Plan

     We may in our discretion interpret and regulate the plan as we deem
necessary or desirable in connection with the operation of the plan and resolve
questions or ambiguities concerning the various provisions of the plan.

Governing Law

     The plan will be governed by the internal laws of the State of Wisconsin.

                         FEDERAL INCOME TAX CONSEQUENCES

     THE FOLLOWING DISCUSSION SETS FORTH THE GENERAL FEDERAL INCOME TAX
CONSEQUENCES FOR AN INDIVIDUAL PARTICIPATING IN THE PLAN. THIS DISCUSSION IS
NOT, HOWEVER, INTENDED TO BE AN EXHAUSTIVE TREATMENT OF THE TAX CONSEQUENCES.
FUTURE LEGISLATIVE CHANGES OR CHANGES IN ADMINISTRATIVE OR JUDICIAL
INTERPRETATION, SOME OR ALL OF WHICH MAY BE RETROACTIVE, COULD SIGNIFICANTLY
ALTER THE TAX TREATMENT DISCUSSED HEREIN. ACCORDINGLY, AND BECAUSE TAX
CONSEQUENCES MAY DIFFER AMONG PARTICIPANTS IN THE PLAN, YOU SHOULD CONSULT YOUR
OWN TAX ADVISOR TO DETERMINE THE PARTICULAR TAX CONSEQUENCES, INCLUDING STATE
INCOME TAX CONSEQUENCES, THAT MAY RESULT FROM PARTICIPATION IN AND THE
SUBSEQUENT DISPOSAL OF SHARES PURCHASED UNDER THE PLAN.

General Considerations

     In general, participants reinvesting dividends under the plan have the same
federal income tax consequences with respect to their dividends as do
shareowners who are not reinvesting dividends under the plan. On the dividend
payment date, participants will receive a taxable dividend equal to the cash
dividend reinvested, to the extent we have earnings and profits. This treatment
applies with respect to both the shares of common stock held of record by the
participant and the participant's plan account shares even though the dividend
amount is not actually received in cash but is instead applied to the purchase
of shares of common stock for the participant's plan account. If shares are
purchased on the open market or in a privately negotiated transaction, then the
participant's share of brokerage fees, if any, that we pay will also be taxed as
an additional dividend to that participant, to the extent we have earnings and
profits.

     Shares or any fractions of shares of common stock purchased on the open
market or in a privately negotiated transaction with reinvested


                                       12


dividends will have a tax basis equal to the amount paid therefor, increased by
any brokerage fees treated as a dividend to the participant. Shares or any
fractions of shares of common stock purchased from us with reinvested dividends
will have a tax basis equal to the amount of the dividend. Whether purchased on
the open market or in a privately negotiated transaction or from us, the shares
or any fractions of shares will have a holding period beginning on the day
following the purchase date.

     Participants that make initial or optional cash investments under the plan
will be deemed to have received an additional taxable dividend in the amount of
the participant's pro rata share of the brokerage commissions, if any, that we
pay, to the extent we have earnings and profits. Such brokerage commissions will
only be incurred on the purchase of the common stock in the open market or in
privately negotiated transactions. Shares or any fractions of shares purchased
with initial or optional cash investments will have a tax basis equal to the
amount of the payments increased by the amount of brokerage fees, if any,
treated as a taxable dividend to the participant with respect to those shares or
fractions of shares. The holding period for the shares or fractions of shares
will begin on the day following the purchase date.

     Participants should not be treated as receiving an additional taxable
dividend based upon their pro rata share of the costs of administering the plan
which we pay. However, we cannot provide any assurances that the Internal
Revenue Service will agree with this position. We have no present plans to seek
formal advice from the IRS on this issue.

     Participants will not recognize taxable income when they receive
certificates for whole shares credited to their account, either upon their
request for the certificates or upon withdrawal from, or termination of the
plan. However, participants will generally recognize gain or loss when shares
acquired under the plan are sold or exchanged either through the plan at their
request or by participants themselves after receipt of certificates for shares
from the plan. Participants will also generally recognize gain or loss when they
receive cash payments for fractional shares credited to their accounts, upon the
sale of shares through the plan or upon withdrawal from or termination of the
plan. The amount of gain or loss is the difference between the amount which the
participant receives for his or her whole shares or fractional shares and the
tax basis thereof. Provided that the shares are capital assets in the hands of
the participant, the gain or loss will be a capital gain or loss, long-term or
short-term depending on the participant's holding period.

Tax Withholding

     In the case of a participating foreign shareowner whose dividends are
subject to United States income tax withholding, or a participating domestic
shareowner subject to backup withholding because a correct taxpayer
identification number has not been furnished or otherwise, the tax required to
be withheld will be deducted from the amount of any cash dividend reinvested.
Since any withholding tax applies also to a dividend on shares credited to the
participant's plan account, only the net dividend on the shares will be applied
to the purchase of additional shares of common stock. The regular statements
sent to participants will indicate the amount of tax withheld. Likewise,
participants selling shares through the plan who are subject to backup or other
withholding will receive only the net cash proceeds from the sale as required by
the Internal Revenue Code and the Treasury Regulations thereunder. We cannot
refund amounts withheld. Participants subject to withholding should contact
their tax advisors or the IRS for additional information.

                         RIGHTS TO PURCHASE COMMON STOCK

     We have entered into a rights agreement pursuant to which each outstanding
share of our common stock has attached a right to purchase one-half of one share
of our common stock. Each share of our common stock we subsequently issue prior
to the expiration of the rights agreement will likewise have attached a right.
Under circumstances described below, the rights will entitle the holder of the
rights to purchase additional shares of our common stock. In this prospectus,
unless the context requires otherwise,


                                       13


all references to our common stock include the accompanying rights.

     Currently, the rights are not exercisable and trade with our common stock.
If the rights become exercisable, then each full right, unless held by a person
or group that beneficially owns more than 15% of our outstanding common stock,
will initially entitle the holder to purchase one half of one share of our
common stock at a purchase price of $95 per full share, or $47.50 per half
share, subject to adjustment. The rights will become exercisable only if a
person or group has acquired, or announced an intention to acquire, 15% or more
of our outstanding common stock. Under some circumstances, including the
existence of a 15% acquiring party, each holder of a right, other than the
acquiring party, will be entitled to purchase at the right's then-current
exercise price, shares of our common stock having a market value of two times
the exercise price. If another corporation acquires us after a party acquires
15% or more of our common stock, then each holder of a right will be entitled to
receive the acquiring corporation's common shares having a market value of two
times the exercise price. The rights may be redeemed at a price of $0.001 until
a party acquires 15% or more of our common stock and, after that time, may be
exchanged for one share of our common stock per right until a party acquires 50%
or more of our common stock. The rights expire on January 20, 2009, subject to
extension. Under the rights agreement, our board of directors may reduce the
thresholds applicable to the rights from 15% to not less than 10%. The rights do
not have voting or dividend rights and, until they become exercisable, have no
dilutive effect on our earnings.

     The rights have certain anti-takeover effects and may discourage or make
more difficult the acquisition of our company on a non-negotiated basis, such as
by an unsolicited tender offer. However, the rights will not affect a
transaction approved by our board of directors prior to the existence of a 15%
acquiring party because the rights can be redeemed before the consummation of
such a transaction.

                                  LEGAL MATTERS

     Some legal matters in connection with the sale of the shares of common
stock offered by this prospectus will be passed upon for us by Foley & Lardner,
Milwaukee, Wisconsin.

                                     EXPERTS

     Our audited financial statements incorporated by reference from our Annual
Report on Form 10-K for the year ended December 31, 2001 have been audited by
Arthur Andersen LLP, independent public accountants, as indicated in its report
with respect thereto, and are included in this prospectus in reliance upon the
authority of said firm as experts in giving said report. Arthur Andersen LLP has
not consented to the incorporation by reference of its report in this
prospectus, and we have dispensed with the requirement to file its consent in
reliance upon Rule 437a of the Securities Act of 1933. The absence of such
consent may limit recovery by investors on certain claims. In particular,
because Arthur Andersen LLP has not consented to the incorporation by reference
of its report in this prospectus, you will not be able to recover against Arthur
Andersen LLP under Section 11 of the Securities Act of 1933 for any untrue
statements of a material fact contained in the financial statements audited by
Arthur Andersen LLP or any omissions to state a material fact required to be
stated therein.

     On June 12, 2002, our board of directors, based on the recommendation of
its audit committee, dismissed Arthur Andersen LLP as our independent
accountants and engaged Deloitte & Touche LLP as our independent public
accountants for 2002. The decision to change independent public accountants was
not the result of any disagreement with Arthur Andersen on matters of accounting
principles or practices, financial statement disclosure or auditing scope or
procedures.

                                       14


                       WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and current reports, proxy statements and other
information with the SEC. We have also filed registration statements on Form
S-3, including exhibits, under the Securities Act of 1933 with respect to the
common stock offered by this prospectus. This prospectus is a part of the
registration statements, but does not contain all of the information included in
the registration or the exhibits. You may read and copy the registration
statement and any other document that we file at the SEC's public reference
rooms at 450 Fifth Street, N.W., Washington D.C., and at regional SEC offices in
New York, New York and Chicago, Illinois. You can call the SEC at 1-800-SEC-0330
for further information on the operation of the public reference rooms. You can
also find our public filings with the SEC on the internet at a web site
maintained by the SEC located at http://www.sec.gov.

     We are "incorporating by reference" specified documents that we file with
the SEC, which means:

     o    incorporated documents are considered part of this prospectus;

     o    we are disclosing important information to you by referring you to
          those documents; and

     o    information we file with the SEC will automatically update and
          supersede information contained in this prospectus.

     This prospectus incorporates by reference the documents listed below that
we have previously filed with the SEC. They contain important information about
us and our financial condition.

       SEC Filings                Description or Period/
    (File No. 1-9894)                   As of Date
---------------------------    -----------------------------

Annual Report on Form 10-K     Year ended 12/31/01

Quarter Reports on             Quarters ended 3/31/02,
Form 10-Q                      6/30/02 and 9/30/02

Current Reports on             Dated 1/1/02 (as amended by
Form 8-K                       its Current Report on Form
                               8-K/A, filed 2/20/02),
                               1/29/02, 6/12/02, 7/19/02
                               and 8/9/02

Registration Statement on      Description of our common
Form 8-B                       stock, dated April 1, 1988

Registration Statement on      Description of our common
Form 8-A                       share purchase rights,
                               dated January 20, 1989

     We also incorporate by reference any future filings we make with the SEC
under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934
after the date of this prospectus and before the end of the offering of our
common stock. These documents include periodic reports, such as Annual Reports
on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K,
as well as proxy statements.

     You can obtain any of the documents incorporated by reference in this
document from the SEC through the SEC's web site at the address provided above.
We will provide to you documents incorporated by reference without charge, upon
your written or oral request, excluding any exhibits to those documents unless
the exhibit is specifically incorporated by reference as an exhibit in this
prospectus. You can obtain documents incorporated by reference in this
prospectus by requesting them in writing or by telephone at the following:

                                       15

  Alliant Energy Corporation
   4902 North Biltmore Lane
   Madison, Wisconsin 53718
     Attention: F.J. Buri
      Corporate Secretary
   Telephone: (608) 458-3311



                           ALLIANT ENERGY CORPORATION

                             SHAREOWNER DIRECT PLAN









                              ____________________


                                   PROSPECTUS

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                                November 19, 2002