John Randolph was an American film, television, and stage actor, and Tony Award-winning character actor. He was best known for You've Got Mail, National Lampoon's Christmas Vacation, King Kong, and Sergio.

Broadway credits include his debut as Jacob in No More Peace (Maxine Elliott's Theatre); Old Man in Prelude to a Kiss (Helen Hayes Theatre); Ben in Broadway Bound (Broadhurst Theatre); Aslak/Herr Trompetstraale/Others in Peer Gynt (ANTA Playhouse); Dennis Corcoran in A Case of Libel (Longacre Theatre); Franz in The Sound of Music (Lunt-Fontanne/Mark Hellinger Theatres); Police Chief Schultz in The Visit (Lunt-Fontanne/Morosco Theatres); Captain Jonas in House of Flowers (Alvin Theatre); Harry in All Summer Long (Coronet/Booth Theatres); Mike Mooney in Paint Your Wagon and Radio Announcer in Hold on to Your Hats (Shubert Theatre); Milkman in Come Back, Little Sheba (Booth Theatre); and Lieutenant Jake Goldberg in Command Decision (Fulton Theatre).