Richard Quine Director Peter Sellers Rudolf IV, Rudolf V, Syd Frewin Actor Lynne Frederick Princess Flavia Actor Lionel Jeffries General Sapt Actor Elke Sommer The Countess Actor Gregory Sierra The Count Actor Jeremy Kemp Duke Michael Actor Catherine Schell Antoinette Actor Simon Williams Fritz Actor Anthony Hope Writer Dick Clement Writer Ian La Frenais Writer Walter Mirisch Producer Henry Mancini Original Music Arthur Ibbetson Cinematographer Byron "Buzz" Brandt Film Editing Lesley De Pettit Casting John J. Lloyd Production Design Herwig Libowitzky Art Director Joe Chevalier Set Decoration Sue Yelland Costume Design