King Arthur / Voice of God / Middle Head / Hiccoughing Guard
Second Swallow-Savvy Guard / The Black Knight / Peasant 3 / Sir Launcelot the Brave / Taunting French Guard / Tim the Enchanter
Dead Collector / Peasant 1 / Sir Robin the Not-Quite-So-Brave-as-Sir Launcelot / First Swamp Castle Guard / Concorde / Roger the Shrubber / Brother Maynard
Patsy / Green Knight / Old Man from Scene 24 (Bridgekeeper) / Sir Bors / Animator / Gorilla Hand
Dennis's Mother / Sir Bedevere / Left Head / Prince Herbert / Voice of Cartoon Scribe
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!
The Witch
Zoot / Dingo
First Monk / Singing Minstrel / Page Crushed by the Rabbit / Peasant #4
Old Crone
Dead Body / Historian Frank
Historian's Wife
Dr. Piglet
Dr. Winston
Prisoner
Girl in Castle Anthrax
Girl in Castle Anthrax
Knight of Ni / Villager at Witch Burning / Musician at Wedding / Monk / Knight in Battle
Girl in Castle Anthrax
Musician at Wedding / Villager at Witch Burning
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Girl in Castle Anthrax
Knight in Battle (uncredited)
Police Sergeant (uncredited)
Peasant (uncredited)
Camp Guard / Robin's Minstrel (uncredited)
Guard who Falls into Barrels (uncredited)
Bash (Mudfighter (uncredited)
Sir Not-Appearing-in-this-Film (uncredited)
Guard Eating Apple (uncredited)
Biff (Mudfighter) (uncredited)
Inspector End of Film (uncredited)
Page-turner (uncredited)
Dancing Knight (uncredited)