Marie Laforêt as Marie-Chantal

Francisco Rabal as Paco Castillo

Serge Reggiani as Ivanov

Charles Denner as Johnson

Stéphane Audran as Olga

Akim Tamiroff as Prof. Lambaré / Dr. Kha

Roger Hanin as Bruno Kerrien

Antonio Passalia as Sparafucile

Pierre-François Moro as Hubert de Ronsac

Robert Burnier as A Swiss Gentleman

Gilles Chusseau as Gregor

Eugenio Di Petra as

Onofrio Arcoleo as

Gérard Tichy as Maitre d'Hôtel

José María Caffarel as (as Caffarel)

Henri Attal as Dumont

Bernard Papineau as

Lahcen Boukish as Thug in a Bournous

Serge Bento as

Claude Chabrol as Bartender (uncredited)

Jacques Hilling as (uncredited)

Albert Michel as (uncredited)