Graham Chapman

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

John Cleese

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

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

Terry Gilliam

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

Terry Jones

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

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!

Connie Booth

The Witch

Carol Cleveland

Zoot / Dingo

Neil Innes

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

Bee Duffell

Old Crone

John Young

Dead Body / Historian Frank

Rita Davies

Historian's Wife

Avril Stewart

Dr. Piglet

Sally Kinghorn

Dr. Winston

Mark Zycon

Prisoner

Elspeth Cameron

Girl in Castle Anthrax

Mitsuko Forstater

Girl in Castle Anthrax

Sandy Johnson

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

Sandy Rose

Girl in Castle Anthrax

Romilly Squire

Musician at Wedding / Villager at Witch Burning

Joni Flynn

Girl in Castle Anthrax

Alison Walker

Girl in Castle Anthrax

Loraine Ward

Girl in Castle Anthrax

Anna Lanski

Girl in Castle Anthrax

Sally Coombe

Girl in Castle Anthrax

Vivienne MacDonald

Girl in Castle Anthrax

Yvonne Dick

Girl in Castle Anthrax

Daphne Darling

Girl in Castle Anthrax

Fiona Gordon

Girl in Castle Anthrax

Judy Lamb

Girl in Castle Anthrax

Tracy Sneddon

Girl in Castle Anthrax

Joyce Pollner

Girl in Castle Anthrax

Mary Allen

Girl in Castle Anthrax

Gloria Graham

Girl in Castle Anthrax

Sylvia Taylor

Girl in Castle Anthrax

Iain Banks

Knight in Battle (uncredited)

Julian Doyle

Police Sergeant (uncredited)

Margarita Doyle

Peasant (uncredited)

Charles Knode

Camp Guard / Robin's Minstrel (uncredited)

Zack Matalon

Guard who Falls into Barrels (uncredited)

Scott Mike

Bash (Mudfighter (uncredited)

William Palin

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

Tom Raeburn

Guard Eating Apple (uncredited)

Brian Ross

Biff (Mudfighter) (uncredited)

Roy Forge Smith

Inspector End of Film (uncredited)

Maggie Weston

Page-turner (uncredited)

John Thornton

Dancing Knight (uncredited)