KANSAS CITY, Mo., Jul 21, 2010 (BUSINESS WIRE) --

Great Plains Energy Incorporated (NYSE:GXP) announced today that it will release its 2010 second quarter earnings on Thursday, August 5, 2010, after the market close. On Friday, August 6, 2010, at 9:00 a.m. EDT, executive officers of the Company will conduct a webcast and conference call to discuss the Company's 2010 second quarter earnings and operating 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 may access the earnings call by dialing (877) 791-9323 (U.S./Canada) or (706) 758-1332 (international) using pass code 74589848. The webcast may be accessed 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 15, 2010 at (800) 642-1687 (U.S./Canada) or (706) 645-9291 (international), pass code 74589848.

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.comor www.kcpl.com.

SOURCE: Great Plains Energy Incorporated

Great Plains Energy
Investors:
Ellen Fairchild, 816-556-2083
Senior Director of Investor Relations and Assistant Secretary
ellen.fairchild@kcpl.com
or
Media:
Katie McDonald, 816-556-2365
Director of Corporate Communications
katie.mcdonald@kcpl.com