Graham Chapman

as King Arthur / Voice of God / Middle Head / Hiccoughing Guard

John Cleese

as Second Swallow-Savvy Guard / The Black Knight / Peasant 3 / Sir Launcelot the Brave / Taunting French Guard / Tim the Enchanter

Eric Idle

as Dead Collector / Peasant 1 / Sir Robin the Not-Quite-So-Brave-as-Sir Launcelot / First Swamp Castle Guard / Concorde / Roger the Shrubber / Brother Maynard

Terry Gilliam

as Patsy / Green Knight / Old Man from Scene 24 (Bridgekeeper) / Sir Bors / Animator / Gorilla Hand

Terry Jones

as Dennis's Mother / Sir Bedevere / Left Head / Prince Herbert / Voice of Cartoon Scribe

Michael Palin

as First Swallow-Savvy Guard / Dennis / Peasant 2 / Right Head / Sir Galahad the Pure / Narrator / King of Swamp Castle / Brother Maynard's Brother / Leader of The Knights Who Say NI!

Connie Booth

as The Witch

Carol Cleveland

as Zoot / Dingo