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

Neil Innes

as First Monk / Singing Minstrel / Page Crushed by the Rabbit / Peasant #4

Bee Duffell

as Old Crone

John Young

as Dead Body / Historian Frank

Rita Davies

as Historian's Wife

Avril Stewart

as Dr. Piglet

Sally Kinghorn

as Dr. Winston

Mark Zycon

as Prisoner

Elspeth Cameron

as Girl in Castle Anthrax

Mitsuko Forstater

as Girl in Castle Anthrax

Sandy Johnson

as Knight of Ni / Villager at Witch Burning / Musician at Wedding / Monk / Knight in Battle

Sandy Rose

as Girl in Castle Anthrax

Romilly Squire

as Musician at Wedding / Villager at Witch Burning

Joni Flynn

as Girl in Castle Anthrax

Alison Walker

as Girl in Castle Anthrax

Loraine Ward

as Girl in Castle Anthrax

Anna Lanski

as Girl in Castle Anthrax

Sally Coombe

as Girl in Castle Anthrax

Vivienne MacDonald

as Girl in Castle Anthrax

Yvonne Dick

as Girl in Castle Anthrax

Daphne Darling

as Girl in Castle Anthrax

Fiona Gordon

as Girl in Castle Anthrax

Judy Lamb

as Girl in Castle Anthrax

Tracy Sneddon

as Girl in Castle Anthrax

Joyce Pollner

as Girl in Castle Anthrax

Mary Allen

as Girl in Castle Anthrax

Gloria Graham

as Girl in Castle Anthrax

Sylvia Taylor

as Girl in Castle Anthrax

Iain Banks

as Knight in Battle (uncredited)

Julian Doyle

as Police Sergeant (uncredited)

Margarita Doyle

as Peasant (uncredited)

Charles Knode

as Camp Guard / Robin's Minstrel (uncredited)

Zack Matalon

as Guard who Falls into Barrels (uncredited)

Scott Mike

as Bash (Mudfighter (uncredited)

William Palin

as Sir Not-Appearing-in-this-Film (uncredited)

Tom Raeburn

as Guard Eating Apple (uncredited)

Brian Ross

as Biff (Mudfighter) (uncredited)

Roy Forge Smith

as Inspector End of Film (uncredited)

Maggie Weston

as Page-turner (uncredited)

John Thornton

as Dancing Knight (uncredited)