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