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)