1: So 's Bill Murray , George Clooney , Scarlett Johansson , Jerry Seinfeld , Howard Stern , Tina Fey , Michael Keaton and Ray Romano . 2: Among the notables are Oprah Winfrey , with whom Letterman has had an on-and-off faux feud for years ; Clooney , who 's starring in  Tomorrowland ,  which will be released on May 22 ; and Stern , who 's always an engaging Letterman guest . 3: Letterman 's guests will include Oprah Winfrey and Bill Murray .
1: So 's Bill Murray , George Clooney , Scarlett Johansson , Jerry Seinfeld , Howard Stern , Tina Fey , Michael Keaton and Ray Romano 2: the notables 3: Letterman 's guests