Jean Dujardin Picquart
Louis Garrel Alfred Dreyfus
Roman Polanski Director, Writer, Concertgoer (uncredited)
Mathieu Amalric Bertillon
Emmanuelle Seigner Pauline Monnier
Vincent Perez Maître Leblois
Melvil Poupaud Maître Labori
Alexandre Desplat Original Music Composer
Damien Bonnard Desvernine
Eric Ruf Sandherr
Nicolas Wanczycki Foucault
Fred Epaud Artillery Officer
Denis Podalydès Maître Demange
Hervé Pierre General Gonse
Grégory Gadebois Henry
Laurent Stocker General de Pellieux
Robert Harris Book, Screenplay
André Marcon Émile Zola
Nicolas Bosc Stunt Double
Vincent Grass General Billot
Luca Barbareschi Philippe Monnier, Co-Producer
Yannik Landrein Gast
Bruno Raffaelli Judge Delegorgue
Benoît Allemane Georges Charpentier
Cyril Holtz Sound Re-Recording Mixer
Michel Vuillermoz Du Paty de Clam
Luce Mouchel Madame Sandherr
Nicolas Bridet Mathieu Dreyfus
Didier Sandre General Boisdeffre
Roman Abramovich Executive Producer
Gérard Chaillou Georges Clémenceau
Sylvette Baudrot Script Supervisor
Alain Goldman Producer
Christophe Maratier Warrant Officer
Vesna Peborde Key Makeup Artist
Paolo Del Brocco Co-Producer
Dominique Moisan Art Direction
Agathe Dupuis Key Hair Stylist
Édith Le Merdy Concierge
Michaël Laguens Casting
Philippe Cord'homme Set Decoration
Pierre Poirot Vallecalle Clerk
Wladimir Yordanoff General Mercier
Philippe Magnan Attorney Brisset
Mohammed Lakhdar-Hamina Bachir
Jeanne Rosa Martha Leblois
Nicolas de Lavergne Auguste Dutrieux (uncredited)
Laurent Natrella Esterhazy
Hervé de Luze Editor
Pierre Aussedat Colonel at Picquart's Arrest
Pascaline Chavanne Costume Design
Jean-Marie Frin Judge Delegorgue
Stefan Godin General Darras
Lucien Balibar Sound
Lionel Mur Journalist
Boris Ventura-Diaz Journalist
Charles Tesnière Officer (uncredited)
Niels Barletta Sound Re-Recording Mixer
Anna Zenowicz Script Supervisor
Pierre Forest Colonel Maurel
Michèle Clément Washerwoman (uncredited)
Franck Mercadal Captain Calmont
Michel Carliez Stunt Coordinator
Thierry Gimenez Colonel Jouaust
Jean Rabasse Production Design
Paweł Edelman Director of Photography
Jean-Marie Lecoq Duel Doctor
Jean-Gilles Barbier Duel Arbiter
Vincent de Boüard Gribelin
Pierre Léon Luneau Captain Valdant (uncredited)
Hubert Engammare First Assistant Director
Yves-Pol Deniélou Journalist