SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
(Amendment No. ____)

Filed by the Registrant [X]
Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[ ] Preliminary Proxy Statement
[ ] Confidential, for Use of the Commission Only (as permitted by Rule
14a-6(e)(2))
[ ] Definitive Proxy Statement
[X] Definitive Additional Materials
[ ] Soliciting Material Pursuant to Section 240.14a-11(c) or Section 240.14a-12

ALLIANT ENERGY CORPORATION_
(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X] No fee required.

[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

1) Title of each class of securities to which transaction applies:

2) Aggregate number of securities to which transaction applies:

3) Per unit price or other underlying value of transaction computed
pursuant to Exchange Act Rule 0-11 (Set forth the amount on which
the filing fee is calculated and state how it was determined):

4) Proposed maximum aggregate value of transaction:

5) Total fee paid:

[ ] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as provided by Exchange Act
Rule 0-11(a)(2) and identify the filing for which the offsetting fee
was paid previously. Identify the previous filing by registration
statement number, or the Form or Schedule and the date of its filing.

1) Amount Previously Paid:

2) Form, Schedule or Registration Statement No.:

3) Filing Party:

4) Date Filed:

PROXY CARD

[ALLIANT LOGO] Shareowners Services
P.O. Box 2568
Madison, WI 53701-2568

SHAREOWNER INFORMATION NUMBERS

Local Madison, WI....1-608-252-3110
All Other Areas......1-800-356-5343

Thank you for being an Alliant Energy shareowner.

Please take a moment to vote your shares for the upcoming Annual
Meeting of Shareowners. You can access our home page at
www.alliant-energy.com to view the Annual Report and Proxy Statement.
You can vote in four ways:

OPTION #1: Vote by Telephone: Call toll free 1-800-660-7580 using a touch tone
- --------- phone 24 hours a day, 7 days a week. You will be asked to enter the
Control Number below.

If you wish to vote "For All Directors" as recommended by the Board
of Directors, simply press 1. Please wait for your confirmation.
If you do not wish to vote as the Board recommends, you need only
respond to a few simple prompts.

There is no charge for this call.

______________________________

Your Control Number is:
[TELEPHONE GRAPHIC] [COMPUTER GRAPHIC]

For Telephone/Internet Voting
_______________________________

(Your telephone or Internet vote authorizes the named proxies to
vote your shares in the same manner as if you had marked, signed and
returned your proxy card.)

OPTION #2: Vote by Internet: Access www.proxyvoting.com/alliant and by using
- --------- the Control Number above, respond to a few simple prompts.

OPTION #3: Vote by Fax: Please mark, sign and date this proxy card and fax to
- --------- 608-252-3321.

OPTION #4: Vote by Mail: If you do not desire to vote by touch tone phone,
- --------- Internet, or fax, please mark, sign, date, and return the proxy
card below.

Your telephone, Internet or fax vote must be received by 5 p.m. CST on
May 16, 2000 to be counted in the final tabulation.

(If you vote by telephone, Internet, or fax, please do not mail this card.)

Please Fold and Detach Proxy Card at Perforation if Voting by Mail.
- --------------------------------------------------------------------------------

Indicate your vote by an (X) in the appropriat boxes.

[ ] I (WE) WILL ATTEND THE ANNUAL MEETING. ELECTION OF DIRECTORS:
---------------------
[ ] I (WE) CONSENT TO ACCESS FUTURE NOTICES OF For All Withhold For All
ANNUAL MEETINGS, PROXY STATEMENTS, AND ANNUAL For All Except(*)
REPORTS ELECTRONICALLY ON THE INTERNET, Nominees for terms
INSTEAD OF RECEIVING THESE MATERIALS BY MAIL. ending in 2003: [ ] [ ] [ ]

P 01 Erroll B. Davis, Jr.
R 02 Lee Liu
O 03 Milton E. Neshek
X 04 Robert W. Schultz
Y 05 Wayne H. Stoppelmoor

(*) TO WITHHOLD AUTHORITY TO VOTE FOR ANY INDIVIDUAL
NOMINEE, STRIKE A LINE THROUGH THE NOMINEE'S NAME IN
THE LIST ABOVE AND MARK AN (X) IN THE "For All Except" BOX.
Please date and sign your name(s) exactly as shown
above and mail promptly in the enclosed envelope.

_________________________________________________ Important: When signing as attorney, executor,
Signature DATE administrator, trustee, or guardian, please give
your full title as such. In the case of JOINT
_________________________________________________ HOLDERS, all should sign.
Signature DATE

[BACK SIDE OF PROXY CARD]

"E" IS FOR EASY....AND ELECTRONIC

To access the Annual Report and Proxy Statement on the Internet, please open our
site at www.alliant-energy.com. We encourage you to check out our site to
see how easy and convenient it is. Click on the Annual Report button for the
Annual Report/Proxy Statement. You may print or just view these materials.
Electronic methods cut down on your paperwork. They also reduce our printing and
postage costs which achieves greater shareowner value. If you would like
electronic access to these reports next year and not receive them by mail, be
sure to indicate this when you vote.

Remember, whether or not you are attending the meeting, we encourage you to vote
your shares and again thank you for being an Alliant Energy Shareowner.

********************************************************************************

WHERE AND WHEN

You are invited to attend the Annual Meeting of Shareowners on Wednesday,
May 17, 2000 at 1:00 p.m. at the Dane County Exposition Center, 1881 Expo Way,
Madison, Wisconsin. A light refreshment will be served following the meeting.

********************************************************************************

ALLIANT ENERGY CORPORATION
P.O. BOX 2568
MADISON, WI 53701-2568

_____________________________________________

ANNUAL MEETING OF SHAREOWNERS - MAY 17, 2000

_____________________________________________

The undersigned appoints Erroll B. Davis, Jr. and Edward M. Gleason,
or either of them, attorneys and proxies, with the power of
substitution to vote all shares of stock of Alliant Energy Corporation
(the "Company"), held of record in the name of the undersigned
(including any shares held or credited to the undersigned's account
under the Company's Sharowner Direct Plan and ISU Employee Stock
Ownership Plan) at the close of business on March 21, 2000, at the
Annual Meeting of Shareowners of the Company, to be held at the Dane
County Exhibition Center, Madison, Wisconsin, on May 17, 2000 at 1:00
p.m., and at all adjournments thereof, upon all matters that properly
come before the meeting, including the matters described in the
Company's Notice of Annual Meeting of Shareowners dated March 27, 2000
and accompanying Proxy Statement, subject to any directions indicated
on the reverse side of this card.

This proxy is solicited on behalf of the Board of Directors of Alliant
Energy Corporation.

This proxy when properly executed will be voted in the manner directed
herein by the shareowner.

If no direction is made, the proxies will vote "FOR" the election of
all listed nominess.

INTRODUCTORY WEB SITE INFORMATION

[ALLIANT LOGO]

1999 Annual Reports

[HOME] [ANNUAL REPORT] [FINANCIAL STATEMENT] [PROXY STATEMENT]

View On-line Version (Optimized for the screen)
-----------------------------------------------

Annual Report

Financial Statement [CLICK ON GRAPHIC TO VOTE YOUR PROXY]

Proxy Statement

Download .PDF Version
---------------------

Annual Report (Doesn't include Financial Statement)

Financial Statement

Proxy Statement

To view the .PDF file, you
must have the Adobe Acrobat
Reader.

o Adobe Acrobat Reader is
available free of charge. To
get a copy of Acrobat Reader,

o go to:
http://www.adobe.com/prodindex/acrobat/readstep.html,
or click on the Get Acrobat Reader button.

[CLICK ON GRAPHIC TO GET ACROBAT READER]

[LNT LOGO] The common stock of Alliant Energy
Corporation is publicly traded on the New
York Stock Exchange under the symbol LNT.