Michael Palin 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!, Writer
John Cleese Second Swallow-Savvy Guard / The Black Knight / Peasant 3 / Sir Launcelot the Brave / Taunting French Guard / Tim the Enchanter, Writer
Terry Gilliam Director, Patsy / Green Knight / Old Man from Scene 24 (Bridgekeeper) / Sir Bors / Animator / Gorilla Hand, Writer
Rita Davies Historian's Wife
Gary Cooper Thanks
Eric Idle Dead Collector / Peasant 1 / Sir Robin the Not-Quite-So-Brave-as-Sir Launcelot / First Swamp Castle Guard / Concorde / Roger the Shrubber / Brother Maynard, Writer
Terry Jones Director, Dennis's Mother / Sir Bedevere / Left Head / Prince Herbert / Voice of Cartoon Scribe, Writer
Connie Booth The Witch
Roger Pratt Assistant Camera
Carol Cleveland Zoot / Dingo
Graham Chapman King Arthur / Voice of God / Middle Head / Hiccoughing Guard, Writer
Sandy Johnson Knight of Ni / Villager at Witch Burning / Musician at Wedding / Monk / Knight in Battle
Bee Duffell Old Crone
Neil Innes First Monk / Singing Minstrel / Page Crushed by the Rabbit / Peasant #4
Michael White Producer, Presenter
Sally Kinghorn Dr. Winston
Charles Knode Camp Guard / Robin's Minstrel (uncredited)
Joni Flynn Girl in Castle Anthrax
Campbell Askew Assistant Editor
Bill Harman Construction Manager
John Goldstone Executive Producer
Thomas Malory Writer
Hugh Strain Sound Mixer
Margarita Doyle Peasant (uncredited)
Howard Atherton Camera Operator
Roy Forge Smith Production Design, Inspector End of Film (uncredited)
Penny Eyles Continuity
Hazel Pethig Costume Design
Gloria Graham Girl in Castle Anthrax
Ian Crafford Sound Effects
Iain Banks Knight in Battle (uncredited)
Mitsuko Forstater Girl in Castle Anthrax
Mark Forstater Producer
Vivienne MacDonald Girl in Castle Anthrax
Julian Doyle Production Manager, Police Sergeant (uncredited)
John Young Dead Body / Historian Frank
Avril Stewart Dr. Piglet
Fiona Gordon Girl in Castle Anthrax
Tom Raeburn Property Master, Guard Eating Apple (uncredited)
Joyce Pollner Girl in Castle Anthrax
Terry Bedford Director of Photography
Sandy Rose Girl in Castle Anthrax
Leo Kharibian Choreographer
Mary Allen Girl in Castle Anthrax
Daphne Darling Girl in Castle Anthrax
Graham Bullock Painter
Pam Luke Makeup Artist
John Hackney Editor
Tracy Sneddon Girl in Castle Anthrax
Jean-Raphaël Dedieu Sound Effects Editor
Maggie Weston Page-turner (uncredited)
Zack Matalon Guard who Falls into Barrels (uncredited)
Mark Zycon Prisoner
Philip Cowlam Assistant Art Director
Yvonne Dick Girl in Castle Anthrax
Christine Watt Production Secretary
Alison Walker Girl in Castle Anthrax
Brian Ross Biff (Mudfighter) (uncredited)
John Thornton Dancing Knight (uncredited)
Sylvia Taylor Girl in Castle Anthrax
Anna Lanski Girl in Castle Anthrax
Gerry Harrison Assistant Director
Sally Coombe Girl in Castle Anthrax
Elspeth Cameron Girl in Castle Anthrax
Loraine Ward Girl in Castle Anthrax
Judy Lamb Girl in Castle Anthrax
William Palin Sir Not-Appearing-in-this-Film (uncredited)
John Foster Sound
Bob Doyle Sound Assistant
John Horton Special Effects
Brian Brockwell Accountant
Garth Marshall Sound Recordist