Miles O'Keeffe as Sir Gawain

Cyrielle Clair as Linet

Leigh Lawson as Humphrey

Sean Connery as The Green Knight

Trevor Howard as The King

Peter Cushing as Seneschal

Ronald Lacey as Oswald

Lila Kedrova as Lady of Lyonesse

John Rhys-Davies as Baron Fortinbras

Wilfrid Brambell as Porter

Bruce Lidington as Sir Bertilak

Douglas Wilmer as The Black Knight

Brian Coburn as Friar Vosper

David Rappaport as Sage

Emma Sutton as Morgan La Fey

Thomas Heathcote as Armourer

John Serret as Priest

Mike Edmonds as Tiny Man

John Pierce Jones as Sergeant

James Windsor as 1st Recruit

Richardson Morgan as 2nd Recruit

Peter Mackriel as 3rd Recruit

Jerold Wells as 1st Torturer

Harry Jones as 2nd Torturer

John J. Carney as Messenger

Peter Firth as Sir Gaiwan (uncredited voice)