Form 8-K 10-29-2004

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)                               October 29, 2004          



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


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

4902 North Biltmore Lane, Madison, Wisconsin 53718
(Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code           (608) 458-3311          


___________________________________________________________________________________________________________________________
(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


[   ]   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[   ]   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[   ]   Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[   ]   Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 2.02   Results of Operations and Financial Condition.

                       On October 29, 2004, Alliant Energy Corporation issued a press release announcing its earnings for the third quarter ended September 30, 2004 and its earnings guidance for 2004. A copy of such press release is furnished as Exhibit 99.1 and is incorporated by reference herein. Alliant Energy has included non-GAAP (non-accounting principles generally accepted in the United States of America) financial information in such press release to enable investors to better understand the core businesses of Alliant Energy.

Item 9.01   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 October 29, 2004.





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: October 29, 2004 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 October 29, 2004

Exhibit
Number

(99.1)                   Alliant Energy Corporation press release dated October 29, 2004.

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