Anna Karina
as Natacha Von Braun
Jean-Pierre Léaud
as Breakfast waiter (uncredited)
Akim Tamiroff
as Henri Dickson
Eddie Constantine
as Lemmy Caution
Valérie Boisgel
as 2nd Seductress Third Class (uncredited)
Jean-Louis Comolli
as Prof. Jeckell (uncredited)
Michel Delahaye
as von Braun's Assistant (uncredited)
Christa Lang
as 1st Seductress Third Class (uncredited)