John Blyth Barrymore III (born May 15, 1954) is an American former film and television actor.
Known for his role as Zeke in the 1970s television series, Kung Fu, he is a member of the Barrymore family, notable for success in acting. His parents are John Drew Barrymore and Cara Williams. Actress Drew Barrymore is his half-sister . He is of partial Irish descent through his father's grandfather, actor Maurice Costello.