Jean-Paul Belmondo as Michel Poiccard / László Kovács

Jean Seberg as Patricia Franchini

Daniel Boulanger as Police Inspector Vital

Henri-Jacques Huet as Antonio Berrutti

Roger Hanin as Carl Zubart

Van Doude as American Journalist, Patricia's Friend

Claude Mansard as Claudius Mansard

Liliane Dreyfus as Liliane / Minouche

Michel Fabre as Police Inspector #2

Jean-Pierre Melville as Parvulesco the Writer

Jean-Luc Godard as The Snitch

Richard Balducci as Tolmatchoff

André S. Labarthe as Journalist at Orly

François Moreuil as Journalist at Orly

Jacques Lourcelles as

Liliane Robin as Minouche

Gérard Brach as Photographer (uncredited)

Philippe de Broca as A Journalist (uncredited)

José Bénazéraf as Man in a White Car (uncredited)

Jean Domarchi as A Drunk (uncredited)

Jean Douchet as A Journalist (uncredited)

Raymond Huntley as A Journalist (uncredited)

Louiguy as (uncredited)

Michel Mourlet as Audience in the Movie Theater (uncredited)

Guido Orlando as (uncredited)

Madame Paul as (uncredited)

Jean-Louis Richard as A Journalist (uncredited)

Jacques Serguine as (uncredited)

Jacques Siclier as (uncredited)

Virginie Ullmann as (uncredited)

Emile Villion as (uncredited)