The film hinges on the love triangle between a young aristocratic lady on the run (Cleonie, played by Hazel Terry), the murderous Varennes, Citizen-Deputy of the Revolution who saves her by disguising her as his nephew (Nils Asther) and finally the Marquis of Corbal of the film's title, played by Hugh Sinclair.
| Actor | Role |
|---|---|
 Nils AstherVarennes | Varennes |
 Hugh SinclairMarquis of Corbal | Marquis of Corbal |
| HHazel TerryCleonie De Montsorbier | Cleonie De Montsorbier |
 Noah BeeryThe Sergeant | The Sergeant |
 Ernst DeutschThe Fugitive | The Fugitive |
 Davy BurnabyPierre | Pierre |
| CClifford McLaglenJean | Jean |
 Arthur RigbyMajor | Major |
 Ralph TrumanCharles | Charles |
| BBrian BuchelRoger | Roger |
| GGordon BeggShepherd | Shepherd |
| VVincent SternroydDeaf Peasant | Deaf Peasant |
 Charles PatonFrench Commandant | French Commandant |
| PPercy WalshGamekeeper | Gamekeeper |
| WWalter SondesChaplain | Chaplain |