Clovis Cornillac as Commissioner Paul Valentin

Diane Kruger as Princess Constance Radetsky

Édouard Baer as Inspector Pujol

Olivier Gourmet as Inspector Marcel 'Le Colosse' Terrasson

Thierry Frémont as Piotr

Jacques Gamblin as Jules Bonnot

Stefano Accorsi as Trainee inspector Achille Bianchi

Léa Drucker as Léa

Philippe Duquesne as Casimir Cagne

Didier Flamand as Prefect of police

Gérard Jugnot as Chief commissioner Faivre

Agnès Soral as Mademoiselle Amélie

Eric Prat as Alphonse Bertillon

Capucine Ackermann as Solène Terrasson

Benjamin Monnier as Solène's fiancé

Roland Copé as Raymond Poincaré, President of the Republic

Nicholas Calderbank as Sir Hollingworth

Anton Yakovlev as Prince's secretary

Valérie Mischler as Singer

Marie Vinoy as Singer

David Bolling as Lawyer

Antonio Cauchois as Investigating judge

Didier Lafaye as Doctor

Mathilde Mottier as Receptionnist of "L'Humanité"

Luc Guiol as Mobile police agent

Robert Paturel as Referee

Grégory Ragot as Mobile police agent

Olivier Sa as

Béatrice Michel as Mrs. Terrasson

Hélène Seuzaret as Adèle Bianci

Félix Malinbaum as Perrin, mobile police agent

Dominique Louyot as Mrs. Caby

Luc-Antoine Salmont as Resident of Ivry

Janis Munz as Little girl from the popular market halls

Rebecca Munz as Little girl from the popular market halls

Eric Debrosse as Commissioner Jouin

Frédéric Jeannot as Newspaper seller

Olivier Breuils as Roget, mobile police agent

Frédéric Bouraly as Caby

Dan Herzberg as Gauzy

Jean-Christophe Bouvet as Judge at the trial

Gérard Loussine as Steemans

Mathias Mlekuz as Hennion

Alexandre Arbatt as Doctor Tanpisev

Alain Figlarz as Inspector Jacquemin

André Marcon as Jean Jaurès, socialist deputy

Marc Robert as Octave Garnier

Pierre Berriau as Raymond Caillememin

Richaud Valls as Pelletier

Aleksandr Medvedev as Prince Volkonsky, plenipotentiary of the Tsar