Marcello Mastroianni as Alex

Sydne Rome as Nancy

Hugh Griffith as Joseph Noblart

Guido Alberti as Priest

Henning Schlüter as Catone

Gianfranco Piacentini as Tony

Christiane Barry as Dresser

Pietro Tordi as Man-Servant

Mogens von Gadow as German

Dieter Hallervorden as German

Romolo Valli as Giovanni

François Périer as Enzo

Roman Polanski as Mosquito

Richard McNamara as Charlie

John Karlsen as Edward

Livio Galassi as

Alvaro Vitali as Cross-Eyed Painter

Renate Langer as Naked Girl with Hat (uncredited)

Carla Mancini as

Nerina Montagnani as