Marcello Mastroianni
Marcello Polletti
Ursula Andress
Caroline Meredith
Elsa Martinelli
Olga
Salvo Randone
Professor
Massimo Serato
Lawyer
Milo Quesada
Rudi
Luce Bonifassy
Lidia
George Wang
Chinese Attacker
Evi Rigano
Victim
Walter Williams
Martin
Richard Armstrong
Cole
Antonio Ciani
Anita Sanders
Relaxatorium Girl (uncredited)
Pier Paolo Capponi
Terrace Snack Bar Manager (uncredited)
Jacques Herlin
Masoch Club Manager (uncredited)
Wolfgang Hillinger
Baron von Richtofen (uncredited)
Mickey Knox
Chet (uncredited)
Gino Pernice
Hunter (uncredited)
Massimo Righi
Journalist (uncredited)
Giovanni Ivan Scratuglia
Priest in Aeroplane (uncredited)