Writer and director Stephen Weeks wanted to cast Mark Hamill as Gawain, but producers Menahem Golan and Yoram Globus cast Miles O'Keeffe instead. O'Keefe's voice was dubbed by Peter Firth.
The words of the riddle said: "Where life is emptiness, gladness.
Where life is darkness, fire.
Where life is golden, sorrow.
Where life is lost, wisdom."
Sir Sean Connery made this movie while filming "Never Say Never Again (1983)," which is why you only see him sporadically throughout the movie.
Trevor Howard's part is supposed to be King Arthur, but is identified in the movie and the credits as just "The King".
Ronald Lacey, who played Oswald, also played the same character in Gawain and the Green Knight (1973).