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):       February 1, 2000


                           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)


              222 West Washington Avenue, Madison, Wisconsin 53703
          -------------------------------------------------------------
          (Address of principal executive offices, including zip code)


                                 (608) 252-3311
                         -------------------------------
                         (Registrant's telephone number)



Item 5.   Other Events.
- -------   ------------

          On February 1, 2000, Alliant Energy Corporation issued a press release
pursuant  to the Rule 135c  under the  Securities  Act of 1933  announcing  that
Alliant   Energy   Resources,   Inc.,  the  parent  company  of  Alliant  Energy
Corporation's diversified operations, completed a private placement of 5,940,960
exchangeable senior notes in the aggregate principal amount of $402.5 million in
accordance with Rule 144A under the Securities Act of 1933. A copy of such press
release is filed as Exhibit 99.1 and is incorporated by reference herein.

          The material terms of the  exchangeable  senior notes are set forth in
(i)  a  Purchase  Agreement,  dated  January  26,  1999,  among  Alliant  Energy
Resources,  Inc., Alliant Energy Corporation and Merrill Lynch, Pierce, Fenner &
Smith  Incorporated;  (ii) an  Indenture,  dated as of November  4, 1999,  among
Alliant Energy Resources,  Inc., Alliant Energy Corporation,  as Guarantor,  and
Firstar Bank, N.A., as Trustee; (iii) a Second Supplemental Indenture,  dated as
of February 1, 2000,  among  Alliant  Energy  Resources,  Inc.,  Alliant  Energy
Corporation,  as  Guarantor,  and Firstar  Bank,  N.A.,  as Trustee;  and (iv) a
Registration  Rights  Agreement,  dated as of  February 1, 2000,  among  Alliant
Energy Resources,  Inc., Alliant Energy  Corporation and Merrill Lynch,  Pierce,
Fenner & Smith  Incorporated.  Copies of such  documents  are filed as  Exhibits
99.2.,  99.3,  99.4 and 99.5,  respectively,  and are  incorporated by reference
herein.


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

          (a)  Not applicable.

          (b)  Not applicable.

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

              (99.1) Alliant Energy  Corporation Press Release dated February 1,
                     2000.

              (99.2) Purchase  Agreement,  dated January 26, 1999, among Alliant
                     Energy  Resources,  Inc.,  Alliant Energy  Corporation  and
                     Merrill Lynch, Pierce, Fenner & Smith Incorporated.

              (99.3) Indenture,  dated as of  November  4, 1999,  among  Alliant
                     Energy  Resources,  Inc.,  Alliant Energy  Corporation,  as
                     Guarantor, and Firstar Bank, N.A., as Trustee [Incorporated
                     by reference to Exhibit (4.1) to the Form S-4  Registration
                     Statement  of Alliant  Energy  Resources,  Inc. and Alliant
                     Energy Corporation (Reg. No. 333-92859)].

              (99.4) Second  Supplemental  Indenture,  dated as of  February  1,
                     2000, among Alliant Energy Resources,  Inc., Alliant Energy
                     Corporation,  as  Guarantor,  and Firstar  Bank,  N.A.,  as
                     Trustee.

              (99.5) Registration  Rights  Agreement,  dated as of  February  1,
                     2000, among Alliant Energy Resources,  Inc., Alliant Energy
                     Corporation  and  Merrill  Lynch,  Pierce,  Fenner  & Smith
                     Incorporated.


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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:  February 1, 2000                 By: /s/ Edward M. Gleason
                                            ----------------------------------
                                            Edward M. Gleason
                                            Vice President-Treasurer and
                                            Corporate Secretary




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                           ALLIANT ENERGY CORPORATION

                   Exhibit Index to Current Report on Form 8-K
                             Dated February 1, 2000


Exhibit
Number
- ------

(99.1)    Alliant Energy Corporation Press Release dated February 1, 2000.

(99.2)    Purchase  Agreement,  dated  January 26, 1999,  among  Alliant  Energy
          Resources, Inc., Alliant Energy Corporation and Merrill Lynch, Pierce,
          Fenner & Smith Incorporated.

(99.3)    Indenture,  dated  as  of  November  4,  1999,  among  Alliant  Energy
          Resources, Inc., Alliant Energy Corporation, as Guarantor, and Firstar
          Bank, N.A., as Trustee  [Incorporated by reference to Exhibit (4.1) to
          the Form S-4 Registration Statement of Alliant Energy Resources,  Inc.
          and Alliant Energy Corporation (Reg. No. 333-92859)].

(99.4)    Second  Supplemental  Indenture,  dated as of February 1, 2000,  among
          Alliant  Energy  Resources,  Inc.,  Alliant  Energy  Corporation,   as
          Guarantor, and Firstar Bank, N.A., as Trustee.

(99.5)    Registration  Rights  Agreement,  dated as of February 1, 2000,  among
          Alliant Energy Resources, Inc., Alliant Energy Corporation and Merrill
          Lynch, Pierce, Fenner & Smith Incorporated.



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