Mel Ferrer
Arthur
Alan Tilvern
Steward (uncredited)
Ava Gardner
Guinevere
Robert Urquhart
Gawaine
Stanley Baker
Modred
Dana Wynter
Morgan Le Fay's servant (uncredited)
Patricia Owens
Lady Vivien (uncredited)
Robert Taylor
Lancelot
Anne Crawford
Morgan Le Fay
Felix Aylmer
Merlin
Maureen Swanson
Elaine
Gabriel Woolf
Percival
Anthony Forwood
Gareth
Niall MacGinnis
Green Knight