William "Biff" McGuire is an American actor. In recent years he has used the name William Biff McGuire professionally.
In a career that has spanned 50 years, McGuire has collected a number of theatrical credits. He was acclaimed for his role as Woody in the 1960 revival of the musical Finian's Rainbow and played King Arthur in one of the first national tours of Camelot. He was nominated for two Tony Awards during his career.
On October 9, 1955, McGuire starred in the episode "Number Seven, Hangman's Row" of the CBS anthology series, Appointment with Adventure. He also starred in the Alfred Hitchcock Presents episodes "The Gentleman From America", "The Hidden Thing", "Crackpot", and "Don't Interrupt".