Peter Sellers

Rudolf IV/Rudolf V/Sidney Frewin

Stuart Wilson

Rupert

Lynne Frederick

Princess Flavia

Elke Sommer

Countess Montparnasse

Gregory Sierra

Count Montparnasse

Catherine Schell

Mauban

Jeremy Kemp

Duke Michael

John Laurie

Archbishop

Ian Abercrombie

Johann

Simon Williams

Lionel Jeffries

Colonel Zapt

Michael Balfour

Graham Stark

Michael Segal

Arthur Howard

Norman Rossington

Brendan Dillon

Joseph (uncredited)

Arthur Ibbetson

Director of Photography

Henry Mancini

Original Music Composer

Anthony Hope

Novel

Ian La Frenais

Screenplay

Richard Quine

Director

Dick Clement

Screenplay

Walter Mirisch

Executive Producer

Byron 'Buzz' Brandt

Editor

Herwig Libowitzky

Art Direction

Joe Chevalier

Set Decoration

Lesley De Pettit

Casting

John J. Lloyd

Production Design

Marc E. Meyer Jr.

Set Decoration

Sue Yelland

Costume Design

David Tomblin

Second Unit Director