U.S. Olympic medalists gather on stage at the Jay Pritzker Pavilion to tape the 23rd season premiere of "The Oprah Winfrey Show" at Millennium Park in Chicago.

Olympic softball players Jessica Mendoza (left) and Laura Berg (right) make their way to the stage at the Jay Pritzer Pavilion to appear with U.S.

Audience members cheer as U.S. Olympic medalists gather on stage at the Jay Pritzker Pavilion to tape the 23rd season premiere of "The Oprah Winfrey Show" in Chicago.

Oprah Winfrey shares a moment with Olympic basketball player Lisa Leslie before appearing with U.S. Olympic medalists on the 23rd season premiere of "The Oprah Winfrey Show" being taped at the Jay Pritzker Pavilion at Millennium Park in Chicago.

Oprah Winfrey poses with Olympic medalist basketball players Dwight Howard (left), and Carlos Boozer (right), before appearing with U.S. Olympic medalists on the 23rd season premiere of "The Oprah Winfrey Show" being taped at Millennium Park in Chicago.

Oprah Winfrey talks to the media before appearing with U.S. Olympic medalists on the 23rd season premiere of "The Oprah Winfrey Show" being taped at the Jay Pritzker Pavilion at Millennium Park.

Oprah Winfrey talks with "Access Hollywood" before taping the 23rd season premiere of "The Oprah Winfrey Show."

Michael Phelps, the U.S. swimmer who won eight gold medals at the Beijing Olympics, arrives Wednesday at Millennium Park in Chicago for "The Oprah Winfrey Show." Winfrey gathered Olympic medalists at the Pritzker Pavilion in Chicago for a celebration to welcome home U.S. competitors.

U.S. Olympic medalists gather on stage at the Jay Pritzker Pavilion to tape the 23rd season premiere of "The Oprah Winfrey Show" at Millennium Park in Chicago.