Alliant Energy Corporation: Declares Common Stock Dividends

MADISON, Wis., Oct. 13 /PRNewswire-FirstCall/ — Alliant Energy Corporation (NYSE:LNT) announced today quarterly dividends on common stock were declared by the Board of Directors.

The common stock dividend is $.2875 per share payable November 15, 2006, to shareowners of record on October 31, 2006.

Dividends on common stock have been paid for 244 consecutive quarters since 1946.

Alliant Energy is an energy-services provider with subsidiaries serving approximately 1 million electric and over 400,000 natural gas customers. Providing its customers in the Midwest with regulated electric and natural gas service is the company’s primary focus. Alliant Energy, headquartered in Madison, Wis., is a Fortune 1000 company traded on the New York Stock Exchange under the symbol LNT. For more information, visit the company’s Web site at http://www.alliantenergy.com/ .

CONTACT: Media, Scott R. Smith, +1-608-458-3924, or, Investor Relations, Becky Johnson, +1-608-458-3267, both of Alliant Energy

Web site: http://www.alliantenergy.com/