Don Beddoe (Imp),
Walter Burke (Gama),
Robert Gist (Scottish Captain),
Sam Harris (Party Guest (uncredited)),
Stuart Holmes (Celebration Guest (uncredited)),
Barry Kelley (Sigurd),
Richard LaMarr (Royal Court Member (uncredited)),
Anna Lee (Lady Constance),
Dayton Lummis (King Mark),
Kerwin Mathews (Jack),
Ken Mayer (Boatswain),
Judi Meredith (Princess Elaine),
Roger Mobley (Peter),
Jack Mower (Nobleman (uncredited)),
Monty O'Grady (Nobleman (uncredited)),
Tudor Owen (Chancellor),
Bert Stevens (Celebration Guest (uncredited)),
Torin Thatcher (Pendragon),
Helen Wallace (Jack's Mother (uncredited)), Herman Belmonte (Nobleman (uncredited))