Jean-Claude Brialy
— Trukhacevskij
Éric Rohmer
— Poznyecev
Françoise Martinelli
— La Femme de Poznyecev
Jean-Luc Godard
— Ami Journaliste
André Bazin
— (uncredited)
Charles L. Bitsch
— (uncredited)
Claude Chabrol
— Cameo (uncredited)
Marc Laferrière
— (uncredited)
François Truffaut
— Cameo (uncredited)