Clooney, Winfrey to appear on David Letterman's show

Celebrity guests like George Clooney, Billy Crystal, Oprah Winfrey and Tom Hanks will appear on David Letterman's final 28 broadcasts of the "Late Show".
"Sex And The City" star Sarah Jessica Parker will appear in this week's episode. Billy Crystal, Julie Chen, and Chris Stapleton will come on April 14.
Michael J Fox and Amy Sedaris are tapped as guests for the April 15 episode with musical guests Iron & Wine and Ben Bridwell, reported Ace Showbiz.
The other booked guests include Robert Downey Jr., Will Ferrell, Tina Fey, Jack Hanna, Scarlett Johansson, Michael Keaton, Steve Martin, Bill Murray, Don Rickles, Julia Roberts, Ray Romano, Paul Rudd, Jerry Seinfeld, Martin Short, Howard Stern, John Travolta, Bruce Willis, The Avett Brothers and Brandi Carlile, Elvis Costello, Dave Matthews Band, Emmylou Harris, Norah Jones, Mumford & Sons, Ralph Stanley and Amos Lee.

Letterman will sign out from the talk show which he has hosted for 22 years on May 20. Stephen Colbert has been tapped to replace him.