 | Marlon Brando als Sir William Walker |
 | Evaristo Márquez als José Dolores |
 | Renato Salvatori als Teddy Sanchez |
 | Dana Ghia als Francesca |
 | Valeria Ferran Wanani als Guarina |
 | Giampiero Albertini als Henry Thompson |
| Norman Hill als Shelton |
| Thomas Lyons als Gen. Alonso Prada |
 | Carlo Palmucci als Jack |
 | Enrico Cesaretti |
| Joseph Patrick Persaud |
| Álvaro Medrano als Soldier |
| Alejandro Obregon |
 | Turam Quibo als Juanito |
| Gillo Pontecorvo | Director |
| Franco Solinas | Story |
| Franco Solinas | Screenplay |
| Giorgio Arlorio | Screenplay |
| Giorgio Arlorio | Story |
| Alberto Grimaldi | Producer |
| Ennio Morricone | Original Music Composer |
| Marcello Gatti | Director of Photography |
| Giuseppe Ruzzolini | Director of Photography |
| Mario Morra | Editor |
| Sergio Canevari | Production Design |
| Luigi Filippo Carta | Camera Operator |
| Elio Polacchi | Camera Operator |
| Otello Spila | Camera Operator |
| Piero Gherardi | Production Design |
| Mario Del Papa | Line Producer |
| Sergio Merolle | Production Manager |
| Rinaldo Ricci | Co-Director |
| Salvatore Basile | First Assistant Director |
| Marilù Carteny | Costume Design |
| Francesco Bronzi | Set Decoration |
| Franco Vanorio | Assistant Production Design |
| Aldo Gasparri | Special Effects |
| Mauro Gavazzi | Makeup Artist |
| Anna Graziosi | Hairstylist |
| Averoe Stefani | Unit Manager |
| Bruno Nicolai | Conductor |
