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