David Miller Director Lana Turner Diane de Poitiers Actor Pedro Armendáriz King Francis I Actor Roger Moore Prince Henri Actor Marisa Pavan Catherine de Medici Actor Cedric Hardwicke Ruggieri Actor Torin Thatcher Louis Actor Taina Elg Alys Actor John Lupton Regnault Actor Henry Daniell Gondi Actor Ronald Green The Dauphin Actor Sean McClory Count Michel Montgomery Actor Geoffrey Toone Duke of Savoy Actor Michael Ansara Count Ridolfi Actor Paul Cavanagh Lord Bonnivetv Actor Melville Cooper 1st Court Physician Actor Ian Wolfe Lord Tremouille Actor Basil Ruysdael Chamberlain Actor Christopher Dark Giancarlo Actor Marc Cavell Piero Actor Gene Reynolds Montecuculli Actor John O'Malley Marechal de Chabannes Actor Peter Gray Sardini Actor Mickey Maga Charles Actor Ronald Anton Francis Actor Christopher Isherwood Screenwriter Edwin H. Knopf Producer Miklós Rózsa Original Music Robert H. Planck Cinematographer John McSweeney Jr. Film Editing Cedric Gibbons Art Director Hans Peters Art Director Henry Grace Set Decoration Edwin B. Willis Set Decoration Walter Plunkett Costume Design