Sophia Loren

Character: Lady Louise Lendale / Lady L

Paul Newman

Character: Armand Denis

David Niven

Character: Dicky, Lord Lendale

Peter Ustinov

Character: Prince Otto of Bavaria

Marcel Dalio

Character: Sapper

Michel Piccoli

Character: Lecoeur

Claude Dauphin

Character: Inspector Mercier

Cecil Parker

Character: Sir Percy

Philippe Noiret

Character: Ambroise Gérôme

Jacques Dufilho

Character: Bealu

Eugene Deckers

Character: Koenigstein

Daniel Emilfork

Character: Kobeleff

Hella Petri

Character: Madam

Jean Wiener

Character: Krajewski

Roger Trapp

Character: Police Inspector Dubaron

Jean Rupert

Character:

Joe Dassin

Character: Police inspector

Jacques Legras

Character: Police inspector

Mario Feliciani

Character: Italian anarchist

Sacha Pitoëff

Character: Bomb-throwing revolutionary

Arthur Howard

Character: Butler

Dorothy Reynolds

Character:

Jacques Ciron

Character:

Hazel Hughes

Character:

Tanya Lopert

Character: Agneau (uncredited)