Harpo Productions says Winfrey intends the show as a "welcome home celebration" and a chance to showcase Chicago as the city bids for the 2016 Summer Olympics.
Other athletes expected to attend include the beach volleyball gold medal team of Misty May-Treanor and Kerri Walsh, gold medal basketball players Carmelo Anthony, Lisa Leslie and Dwyane Wade, and silver medal swimmer Dara Torres.
The 23rd season premiere of Winfrey's talk show will air September 8th.
