UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549

                            _______________________

                                   FORM 8-K


                                CURRENT REPORT


                      Pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934

                            _______________________


                 Date of Report
                 (Date of earliest
                 event reported):   April 28, 2003


                          Alliant Energy Corporation
            ------------------------------------------------------
            (Exact name of registrant as specified in its charter)


   Wisconsin                    1-9894                    39-1380265
---------------            ----------------          -------------------
(State or other            (Commission File             (IRS Employer
jurisdiction of                Number)               Identification No.)
incorporation)


              4902 North Biltmore Lane, Madison, Wisconsin 53718
         ------------------------------------------------------------
         (Address of principal executive offices, including zip code)


                                (608) 458-3311
                        -------------------------------
                        (Registrant's telephone number)



Item 7.    Financial Statements and Exhibits.
------     ---------------------------------

           (a)  Not applicable.

           (b)  Not applicable.

           (c)  Exhibits.  The following exhibits are being furnished herewith:
                --------

                (99.1)    Alliant Energy  Corporation press release dated April
                          28, 2003.

                (99.2)    Script for conference call held April 28, 2003.

Item 9.    Regulation FD Disclosure (Information Being Provided Under Item 12).
------     -------------------------------------------------------------------

           On April  28,  2003,  Alliant  Energy  Corporation  (the  "Company")
issued a press  release  announcing  its earnings for the first  quarter  ended
March  31,  2003 and its  earnings  guidance  for  2003.  A copy of such  press
release is furnished as Exhibit 99.1 and is incorporated by reference herein.

           On April 28, 2003, the Company held a conference  call in connection
with the  Company's  announcement  of its earnings for the first  quarter ended
March 31, 2003 and its  earnings  guidance  for 2003.  A copy of the script for
such  conference  call is  furnished as  Exhibit 99.2  and is  incorporated  by
reference   herein.  An  archive  of  such  conference  call  and  the  related
question and answer  session will be  available  on the  Company's  web site at
www.alliantenergy.com/investors.
-------------------------------

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                                  SIGNATURES
                                  ----------

           Pursuant  to the  requirements  of the  Securities  Exchange  Act of
1934,  the  registrant  has duly  caused this report to be signed on its behalf
by the undersigned hereunto duly authorized.

                                  ALLIANT ENERGY CORPORATION



Date:  April 28, 2003           By: /s/  John E. Kratchmer
                                    -----------------------------------
                                    John E. Kratchmer
                                    Vice President-Controller and Chief
                                    Accounting Officer




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                          ALLIANT ENERGY CORPORATION

                  Exhibit Index to Current Report on Form 8-K
                             Dated April 28, 2003


Exhibit
Number
------

(99.1)     Alliant Energy Corporation press release dated April 28, 2003.

(99.2)     Script for conference call held April 28, 2003.



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