 Kay FrancisIrina Radovic | Irina Radovic |
 Nils AstherCapt. Geza Petery | Capt. Geza Petery |
 Walter HustonMayor Dushan Radovic | Mayor Dushan Radovic |
 Phillips HolmesCsaholyi | Csaholyi |
 Eugene PalletteJanos | Janos |
 C. Henry GordonPanto Nikitch | Panto Nikitch |
| LLouise Closser HaleMilitza Brooska | Militza Brooska |
 Jean ParkerDanitza | Danitza |
 Oscar ApfelCounselor Velasch (uncredited) | Counselor Velasch (uncredited) |
 Mischa AuerGavrilo Princip (uncredited) | Gavrilo Princip (uncredited) |
 James BellPeter (uncredited) | Peter (uncredited) |
| HHal BoyerMitry, a Deserter (uncredited) | Mitry, a Deserter (uncredited) |
| FFrank BurkeJankovitch (uncredited) | Jankovitch (uncredited) |
 Frank ConroyArchduke Franz Ferdinand (uncredited) | Archduke Franz Ferdinand (uncredited) |
 Richard CramerStepan, Dushan's Servant (uncredited) | Stepan, Dushan's Servant (uncredited) |
 Margaret DumontDuchess Sophie (uncredited) | Duchess Sophie (uncredited) |
| AAllen FoxGreg, a Deserter (uncredited) | Greg, a Deserter (uncredited) |
 Etienne GirardotHungarian Officer (uncredited) | Hungarian Officer (uncredited) |
 Charles HaltonVillager (uncredited) | Villager (uncredited) |
 Leonid KinskeySerbian Villager (uncredited) | Serbian Villager (uncredited) |
 Ferdinand MunierWhite-Bearded Party Guest (uncredited) | White-Bearded Party Guest (uncredited) |
 Russ PowellMan Introducing Durosch (uncredited) | Man Introducing Durosch (uncredited) |
 Lucien PrivalHungarian Soldier (uncredited) | Hungarian Soldier (uncredited) |
 Harry SemelsSerbian Villager (uncredited) | Serbian Villager (uncredited) |
 Akim TamiroffGypsy Fiddler (uncredited) | Gypsy Fiddler (uncredited) |
 Wilhelm von BrinckenHungarian Officer (uncredited) | Hungarian Officer (uncredited) |
| MMilton WallaceCol. Patou (uncredited) | Col. Patou (uncredited) |
 Clarence WilsonCapt. Durosch (uncredited) | Capt. Durosch (uncredited) |
