Carroll Baker as Nicole Perrier

Jean-Louis Trintignant as Jean Reynaud

Erika Blanc as Danielle Reynaud

Horst Frank as Klaus

Helga Liné as Helene Valmont

Ermelinda De Felice as Hotel Proprietor

Giovanni Di Benedetto as Monsieur Valmont

Irio Fantini as Party Guest

Dario Michaelis as Police Commissioner

Renato Pinciroli as Porter

Gianni Pulone as Press Photographer

Lucio Rama as Party Guest

Paola Scalzi as Helene's Friend

Luigi Sportelli as Party Guest

Beryl Cunningham as Black Stripper

Marcello Bonini Olas as Party Guest (uncredited)

Alessandro Tedeschi as Uomo Della Commissione (uncredited)