Richard Burton (King Arthur), Julie Andrews (Queen Guenevere), Robert Goulet (Sir Lancelot), Michael Clarke-Laurence (Merlyn), Robert Coote (Pellinore), Roddy McDowell (Mordred), John Cullum (Sir Dinadan), M'el Dowd (Morgan le Fay), Steve Curry (Tom of Warwick), Marjorie Smith (Nimue), Jack Dabdoub (Sir Lionel)