- Jean Gabin as Lieutenant Maréchal, a French officer, of modest social background
- Marcel Dalio as Lieutenant Rosenthal, a French officer, of nouveau riche Ashkenazi Jewish ancestry
- Pierre Fresnay as Captain de Boëldieu, a French flying ace and member of the French nobility
- Erich von Stroheim as Captain (later Major) von Rauffenstein, a German flying ace and member of the German nobility
- Dita Parlo as Elsa, a German farmwife and war widow
- Julien Carette as Cartier, the vaudeville performer
- Gaston Modot as an engineer
- Georges Péclet as an officer
- Werner Florian as Sgt. Arthur
- Jean Dasté as a teacher
- Sylvain Itkine as Lieutenant Demolder
- Jacques Becker as British officer (uncredited)[7][8][9]
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