On screen
Cast
25 credited performers
Sophia Loren
Lady Louise Lendale / Lady L
Paul Newman
Armand Denis
David Niven
Dicky, Lord Lendale
Peter Ustinov
Prince Otto of Bavaria
Marcel Dalio
Sapper
Michel Piccoli
Lecoeur
Claude Dauphin
Inspector Mercier
Cecil Parker
Sir Percy
Philippe Noiret
Ambroise Gérôme
Jacques Dufilho
Bealu
Eugene Deckers
Koenigstein
Daniel Emilfork
Kobeleff
Artwork unavailable
Hella Petri
Madam
Jean Wiener
Krajewski
Roger Trapp
Police Inspector Dubaron
Jean Rupert
Character not listed
Joe Dassin
Police inspector
Jacques Legras
Police inspector
Mario Feliciani
Italian anarchist
Artwork unavailable
Sacha Pitoëff
Bomb-throwing revolutionary
Arthur Howard
Butler
Dorothy Reynolds
Character not listed
Jacques Ciron
Character not listed
Hazel Hughes
Character not listed
Tanya Lopert
Agneau (uncredited)