Alliant Energy Corporation Declares Common Stock Dividend

248th consecutive quarter of common stock dividend payouts

MADISON, Wis., Oct. 12 /PRNewswire-FirstCall/ — Alliant Energy Corporation (NYSE:LNT) announced today quarterly dividends on common stock were declared by the Board of Directors.

(Logo: http://www.newscom.com/cgi-bin/prnh/20020405/LNTLOGO)

The common stock dividend is $0.3175 per share payable November 15, 2007, to shareowners of record on close of business, October 31, 2007.

Dividends on common stock have been paid for 248 consecutive quarters since 1946.

Alliant Energy is an energy-services provider with subsidiaries serving approximately 1 million electric and over 420,000 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/.

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Source: Alliant Energy Corporation