Buck Henry (born Henry Zuckerman; December 9, 1930 – January 8, 2020) was an American actor, screenwriter, and director. Henry's contributions to film included his work as a co-writer for Mike Nichols's The Graduate (1967) for which he received a nomination for the Academy Award for Best Adapted Screenplay. He appeared in acting roles in Nichols's Catch-22 (1970)—also co-written with Nichols—Herbert Ross's The Owl and the Pussycat (1970), and Peter Bogdanovich's What's Up, Doc? (1972). In 1978, he co-directed Heaven Can Wait (1978) with Warren Beatty, receiving a nomination for the Academy Award for Best Director. He later appeared in Albert Brooks's Defending Your Life (1991), and the Robert Altman films The Player (1992) and Short Cuts (1993).

His long career began on television with work on shows with Steve Allen in The New Steve Allen Show (1961). He co-created Get Smart (1965–1970) with Mel Brooks for which he received the Primetime Emmy Award for Outstanding Writing for a Comedy Series. He also served as a 10-time host of Saturday Night Live (SNL) and was the inaugural member of the show's Five Timer's Club, a humorous designation used to denote people who have hosted at least five episodes of SNL. He later guest-starred in such popular shows as Murphy Brown, Hot in Cleveland, Will & Grace, and 30 Rock.