Marcello Mastroianni

Alex

Sydne Rome

Nancy

Hugh Griffith

Joseph Noblart

Guido Alberti

Priest

Henning Schlüter

Catone

Gianfranco Piacentini

Tony

Christiane Barry

Dresser

Pietro Tordi

Man-Servant

Mogens von Gadow

German

Dieter Hallervorden

German

Romolo Valli

Giovanni

François Périer

Enzo

Roman Polanski

Mosquito

Richard McNamara

Charlie

John Karlsen

Edward

Livio Galassi

Alvaro Vitali

Cross-Eyed Painter

Renate Langer

Naked Girl with Hat (uncredited)

Carla Mancini

Nerina Montagnani