Great Plains Energy Announces Second Quarter 2009 Earnings Webcast and Conference Call

Great Plains Energy Incorporated (NYSE: GXP) announced today that it will release its 2009 second quarter and year-to-date earnings on Wednesday, August 5, 2009, after the market closes. The Company will also be providing an update on the cost and anticipated in-service date for the new Iatan 2 coal plant. On Thursday, August 6, 2009, at 9:00 a.m. EDT, the Company’s executive officers will conduct a webcast and conference call to discuss the Company’s results. To access supplemental financial information and the earnings webcast presentation for the call, please visit the Great Plains Energy website at www.greatplainsenergy.com. The information will be available in the Upcoming Events section on the main page after market close on August 5.

Stockholders, analysts and other interested parties can access the earnings call by dialing (877) 791-9323 (U.S./Canada) or (706) 758-1332 (international) using pass code 12951168. The call will also be webcast and can be accessed in a listen-only mode on Great Plains Energy’s website at www.greatplainsenergy.com. A replay of the webcast will be available on Great Plains Energy’s website and also telephonically through August 13, 2009 at (800) 642-1687 (U.S./Canada) or (706) 645-9291 (international), pass code 12951168.

ABOUT GREAT PLAINS ENERGY

Headquartered in Kansas City, Mo., Great Plains Energy Incorporated (NYSE: GXP) is the holding company of Kansas City Power & Light Company and KCP&L Greater Missouri Operations Company, two of the leading regulated providers of electricity in the Midwest. Kansas City Power & Light and KCP&L Greater Missouri Operations use KCP&L as a brand name. More information about the companies is available on the Internet at: www.greatplainsenergy.com or www.kcpl.com.