Jeanne Moreau as Mata Hari

Jean-Louis Trintignant as Captain François Lasalle

Claude Rich as Julien the Chauffeur

Henri Garcin as Gaston

Georges Riquier as Ludovic

Frank Villard as Colonel Emile Pelletier / Legrand

Albert Rémy as Adam Zelle

Hella Petri as La baronne du Maine

Nicole Desailly as Charlotte

Carla Marlier as Ernestine

Marcel Berbert as Le détective qui piste Mata-Hari

Georges Géret as Soldier #2

Charles Denner as Soldier #1

Henri Coutet as Soldier (uncredited)

Max Desrau as Un spectateur à l'Alcazar (uncredited)

Van Doude as Le policier à l'entrée de la banque (uncredited)

Marie Dubois as Marie (uncredited)

Yvette Etiévant as L'infirmière sur le front (uncredited)

Marcel Gassouk as Un policier (uncredited)

Jean-Pierre Léaud as Absalon

Claude Mansard as Le directeur de l'Alcazar (uncredited)