 Tyrone PowerPedro De Vargas | Pedro De Vargas |
 Jean PetersCatana Perez | Catana Perez |
 Cesar RomeroHernando Cortez | Hernando Cortez |
 Lee J. CobbJuan Garcia | Juan Garcia |
 John SuttonDiego De Silva | Diego De Silva |
 Antonio MorenoDon Francisco De Vargas | Don Francisco De Vargas |
 Thomas GomezFather Bartolome Romero | Father Bartolome Romero |
 Alan MowbrayProf. Botello | Prof. Botello |
 Barbara LawrenceLuisa De Carvajal | Luisa De Carvajal |
 George ZuccoMarquis De Carvajal | Marquis De Carvajal |
 Roy RobertsCapt. Alvarado | Capt. Alvarado |
 Marc LawrenceCorio | Corio |
 Mimi AgugliaDoña Hernandez (uncredited) | Doña Hernandez (uncredited) |
 Virginia BrissacDoña Maria De Vargas (uncredited) | Doña Maria De Vargas (uncredited) |
 Robert AdlerReyes (uncredited) | Reyes (uncredited) |
| DDolly ArriagaMercedes De Vargas (uncredited) | Mercedes De Vargas (uncredited) |
| JJohn BurtonDeLora (uncredited) | DeLora (uncredited) |
| GGuillermo CallesAztec (uncredited) | Aztec (uncredited) |
 Harry CarterCapt. Sandoval (uncredited) | Capt. Sandoval (uncredited) |
| DDavid CotaSinger (uncredited) | Singer (uncredited) |
 Gilberto GonzálezAztec Ambassador (uncredited) | Aztec Ambassador (uncredited) |
 Reed HadleyJuan Escudero (uncredited) | Juan Escudero (uncredited) |
 Estela IndaDoña Marina (uncredited) | Doña Marina (uncredited) |
 Robert KarnesManuel Perez (uncredited) | Manuel Perez (uncredited) |
 John LaurenzDiego Cermeno (uncredited) | Diego Cermeno (uncredited) |
 Fred LibbyHernan Soler (uncredited) | Hernan Soler (uncredited) |
 Chris-Pin MartinSancho Lopez (uncredited) | Sancho Lopez (uncredited) |
| EEdward MundyCrier (uncredited) | Crier (uncredited) |
| JJulian RiveroMarquis' Servant (uncredited) | Marquis' Servant (uncredited) |
 Robert ShawSpanish Army Officer (uncredited) | Spanish Army Officer (uncredited) |
