King Arthur / God / Middle Head (voice) (archive footage)
Second Swallow-Savvy Guard / Large man with dead body / The Black Knight / Peasant 3 / Sir Lancelot, the Brave / Taunting French Guard / Tim the Enchanter
Patsy / Green Knight / Bridgekeeper / Sir Bors
Historyteller / Dead Collector / Peasant 1 / Sir Robin the Not-Quite-So-Brave-as-Sir Launcelot / Concorde / Roger the Shrubber / Brother Maynard / Advisor of King Brian / Herald
Game Announcer / Dennis' Mother / Sir Bedevere / Left Head / Cartoon Scribe / Prince Herbert / King Brian the Wild (voice)
First Game Announcer / Swallow-Savvy Guard / Dennis / Peasant 2 / Right Head / Sir Galahad the Pure / King of Swamp Castle / Brother Maynard's Brother / Leader of The Knights who say NI!
Zoot / Dingo (archive footage)
First Monk / Singing Minstrel / Page Crushed by the Rabbit / Peasant #4 (archive footage)
Virgin
Spanking man / E-mail (voice)