Number of former presidents who have appeared on the show. Former Presidents Jimmy Carter, George H.W. Bush, Bill Clinton and George W. Bush have all sat down with the host for interviews. Photo: Winfrey interviews former President George W. Bush during taping of "The Oprah Winfrey Show" at Harpo Studios in Chicago on Oct. 28, 2010, for the episode that aired Nov. 9, 2010.
Harpo, Inc. / George Burns / Associated Press