¿Qué?: Reparto

Marcello Mastroianni
Alex

Sydne Rome
Nancy

Hugh Griffith
Joseph Noblart

Guido Alberti
Priest

Henning Schlüter
Catone
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

Alvaro Vitali
Cross-Eyed Painter

Renate Langer
Naked Girl with Hat (uncredited)