Jean Dujardin Picquart
Emmanuelle Seigner Pauline Monnier
Roman Polanski Director, Concertgoer (uncredited), Writer
Louis Garrel Alfred Dreyfus
Mathieu Amalric Bertillon
Grégory Gadebois Henry
Franck Mercadal Captain Calmont
Wladimir Yordanoff General Mercier
Melvil Poupaud Maître Labori
Vincent Perez Maître Leblois
Alexandre Desplat Original Music Composer
Fred Epaud Artillery Officer
Benoît Allemane Georges Charpentier
Paolo Del Brocco Co-Producer
Jean-Marie Frin Judge Delegorgue
Brigitte Boucher Marie Bastian (uncredited)
Luce Mouchel Madame Sandherr
Gérard Chaillou Georges Clémenceau
Ludovic Paris Senator Ranc
Zbigniew Gustowski Focus Puller
Luca Barbareschi Co-Producer, Philippe Monnier
Thierry Gimenez Colonel Jouaust
Jean-Gilles Barbier Duel Arbiter
Jean-Marie Lecoq Duel Doctor
Clément Jacqmin Journalist
Philippe Magnan Attorney Brisset
Damien Bonnard Desvernine
Kevin Garnichat Lauth
Didier Sandre General Boisdeffre
Jeanne Rosa Martha Leblois
Lukasz Raczynski Executive Producer
Nicolas Bridet Mathieu Dreyfus
Laurent Natrella Esterhazy
Constantino Margiotta Executive Producer
Pierre Forest Colonel Maurel
Roman Abramovich Executive Producer
Eric Ruf Sandherr
Swan Starosta Lucie Dreyfus
Hervé Pierre General Gonse
Pierre Léon Luneau Captain Valdant (uncredited)
Robert Harris Book, Screenplay
Nicolas Wanczycki Foucault
Kasia Nabialczyk Executive Producer
Laurent Stocker General de Pellieux
Denis Podalydès Maître Demange
Raphaël Caraty Journalist
Vincent Grass General Billot
Zbigniew Raczynski Executive Producer
Vincent de Boüard Gribelin
Yannik Landrein Gast
Cyril Holtz Sound Re-Recording Mixer
Fabien Tucci Security Officer
Mathieu Cayrou Private Dugommier (uncredited)
Pierre Hurel Man (uncredited)
André Marcon Émile Zola
Paweł Edelman Director of Photography
Édith Le Merdy Concierge
Bruno Raffaelli Judge Delegorgue
Charles Tesnière Officer (uncredited)
Philippe Cord'homme Set Decoration
Pierre Aussedat Colonel at Picquart's Arrest
Michel Vuillermoz Du Paty de Clam
Hubert Engammare First Assistant Director
Agathe Dupuis Key Hair Stylist
Mohammed Lakhdar-Hamina Bachir
Michaël Laguens Casting
Sylvette Baudrot Script Supervisor
Alain Féat Sound Editor
Nicolas de Lavergne Auguste Dutrieux (uncredited)
Aymeric Devoldère Supervising Sound Editor
Pierre Poirot Vallecalle Clerk
Hervé de Luze Editor