 Klaus KinskiDon Lope de Aguirre | Don Lope de Aguirre |
 Helena RojoInés de Atienza | Inés de Atienza |
 Del NegroBrother Gaspar de Carvajal | Brother Gaspar de Carvajal |
 Ruy GuerraDon Pedro de Ursúa | Don Pedro de Ursúa |
 Peter BerlingDon Fernando de Guzmán | Don Fernando de Guzmán |
| CCecilia RiveraFlores, Aguirre's Daughter | Flores, Aguirre's Daughter |
 Daniel AdesPerucho | Perucho |
 Edward RolandOkello | Okello |
| AAlexandra ChevesNot listed | Not listed |
| AArmando PolanahArmando | Armando |
| DDaniel FarfánNot listed | Not listed |
| JJulio E. MartínezNot listed | Not listed |
| AAlejandro RepullésGonzalo Pizarro | Gonzalo Pizarro |
 Claus BiederstaedtBrother Gaspar de Carvajal (voice) (uncredited) | Brother Gaspar de Carvajal (voice) (uncredited) |
| LLothar BlumhagenDon Pedro de Ursúa (voice) (uncredited) | Don Pedro de Ursúa (voice) (uncredited) |
| HHeinz Theo BrandingDon Fernando de Guzmán (voice) (uncredited) | Don Fernando de Guzmán (voice) (uncredited) |
 Christian BrücknerBalthasar (voice) (uncredited) | Balthasar (voice) (uncredited) |
| MMichael ChevalierConqueror Being Beheaded (voice) (uncredited) | Conqueror Being Beheaded (voice) (uncredited) |
| NNorbert GescherConqueror (voice) (uncredited) | Conqueror (voice) (uncredited) |
| JJusto GonzálezGonzález (uncredited) | González (uncredited) |
| UUta HallantInés / Flores (voice) (uncredited) | Inés / Flores (voice) (uncredited) |
 Manfred LehmannConqueror (voice) (uncredited) | Conqueror (voice) (uncredited) |
| AAntonio Marquez(uncredited) | (uncredited) |
| GGerd MartienzenDon Lope de Aguirre (voice) (uncredited) | Don Lope de Aguirre (voice) (uncredited) |
| EEdgar OttGonzalo Pizarro (voice) (uncredited) | Gonzalo Pizarro (voice) (uncredited) |
| UUwe PaulsenOkello (voice) (uncredited) | Okello (voice) (uncredited) |
| DDieter RanspachPerucho (voice) (uncredited) | Perucho (voice) (uncredited) |
