Stephen Weeks Director Miles O'Keeffe Sir Gawain Actor Cyrielle Clair Linet Actor Sean Connery The Green Knight Actor Leigh Lawson Humphrey Actor Trevor Howard The King Actor Peter Cushing Seneschal - Gaspar Actor Ronald Lacey Oswald Actor Lila Kedrova Lady of Lyonesse Actor John Rhys-Davies Baron Fortinbras Actor Wilfrid Brambell Porter Actor Brian Coburn Friar Vosper Actor David Rappaport Sage Actor Douglas Wilmer The Black Knight Actor Emma Burdon-Sutton Morgan La Fay Actor Jean Serret Priest Actor Menahem Golan Producer Yoram Globus Producer Philip M. Breen Executive Producer Michael Kagan Executive Producer Ron Geesin Original Music Peter Hurst Cinematographer Freddie Young Cinematographer Richard Marden Film Editing Barry Peters Film Editing Maude Spector Casting Maurice Fowler Production Design Derek Nice Production Design Shuna Harwood Costume Design