 It was directed by Ken Annakin, and stars Beau Bridges as the twins (Louis XIV and Philippe of Gascony), Sylvia Kristel as Maria Theresa, Ursula Andress as Louise de La Vallière, Cornel Wilde as d'Artagnan, Ian McShane as Fouquet, Rex Harrison as Colbert (Philippe's tutor), and Lloyd Bridges, José Ferrer and Alan Hale Jr. as the Three Musketeers.Olivia de Havilland made her final theatrical film role in a cameo appearance as the Queen Mother.Filming took place in September 1976 under the title "Behind the Iron Mask" to avoid confusion with a TV movie version called "The Man in the Iron Mask".