- Graham Chapman
- King Arthur/Voice of God/Middle Head/Hiccoughing Guard, Writer
- John Cleese
- Second Soldier with an Interest in Birds/Large Man with Dead Body/Black Knight/Mr Newt/An Extraordinarily Rude Frenchman/Tim the Wizard/Sir Launcelot, Writer
- Terry Gilliam
- Patsy (Arthur's Trusty Steed)/Green Knight/Soothsayer/Bridgekeeper/Sir Gawain(The First to be Killed by the Rabbit)/Animator, Director, Writer
- Eric Idle
- Dead Collector/Mr Blint/Sir Robin/The Guard Who Doesn't Hiccough but Tries to Get Things Straight/Concorde/Roger the Shrubber/Brother Maynard, Writer
- Neil Innes
- The First Self-Destructive Monk/Robin's Least Favourite Minstrel/The Page Crushed by a Rabbit/The Owner of a Duck, Original Music
- Terry Jones
- Dennis's Mother/Sir Bedevere/Left Head/Voice of Cartoon Scribe/Prince Herbert, Director, Writer
- Michael Palin
- 1st Soldier with an Interest in Birds/Dennis/Mr Duck/Right Head/Sir Galahad/Leader of Knights/Narrator/King of Swamp Castle/Brother Maynard's Roomate, Writer
- Connie Booth
- The Witch
- Carol Cleveland
- Zoot and Dingo
- Bee Duffell
- Old Crone to Whom King Arthur Said "Ni!"
- John Young
- The Dead Body That Claims It Isn't/The Historian Who Isn't A.J.P. Taylor At All
- Rita Davies
- The Historian Who Isn't A.J.P. Taylor (Honestly)'s Wife
- Sally Kinghorn
- Either Winston or Piglet
- Terry Gilliam
- Patsy (Arthur's Trusty Steed)/Green Knight/Soothsayer/Bridgekeeper/Sir Gawain(The First to be Killed by the Rabbit)/Animator, Director, Writer
- Terry Jones
- Dennis's Mother/Sir Bedevere/Left Head/Voice of Cartoon Scribe/Prince Herbert, Director, Writer
- Graham Chapman
- King Arthur/Voice of God/Middle Head/Hiccoughing Guard, Writer
- John Cleese
- Second Soldier with an Interest in Birds/Large Man with Dead Body/Black Knight/Mr Newt/An Extraordinarily Rude Frenchman/Tim the Wizard/Sir Launcelot, Writer
- Eric Idle
- Dead Collector/Mr Blint/Sir Robin/The Guard Who Doesn't Hiccough but Tries to Get Things Straight/Concorde/Roger the Shrubber/Brother Maynard, Writer
- Michael Palin
- 1st Soldier with an Interest in Birds/Dennis/Mr Duck/Right Head/Sir Galahad/Leader of Knights/Narrator/King of Swamp Castle/Brother Maynard's Roomate, Writer
- John Goldstone
- Executive Producer
- Mark Forstater
- Producer
- De Wolfe
- Original Music
- Neil Innes
- The First Self-Destructive Monk/Robin's Least Favourite Minstrel/The Page Crushed by a Rabbit/The Owner of a Duck, Original Music
- John Hackney
- Film Editing
- Roy Forge Smith
- Production Design
- Hazel Pethig
- Costume Design
- Pam Luke
- Makeup Artist
- Pearl Rashbass
- Makeup Artist
- Julián Doyle
- Production Manager
- Gerry Harrison
- Assistant Director
