 | Steve Reeves als Romulus |
 | Gordon Scott als Remus |
 | Virna Lisi als Julia |
 | Franco Volpi als Amulio |
 | Massimo Girotti als Tazio |
 | Jacques Sernas als Curzio |
 | Laura Solari als Rea Silvia |
 | Germano Longo als Scebro |
 | Ornella Vanoni als Tarpeia |
 | Piero Lulli als Sulpicius |
| José Greci |
 | Gianni Musy |
| Inger Milton |
 | Enzo Cerusico |
 | Andrea Bosic |
 | Enrico Glori |
 | Franco Balducci |
| Bruno Tocci |
 | Giuliano Dell'Ovo |
| Nando Angelini |
 | Armando Fracassi als Fight Spectator (uncredited) |
| Sergio Corbucci | Director |
| Piero Piccioni | Original Music Composer |
| Enzo Barboni | Director of Photography |
| Gabriele Varriale | Editor |
| Carlo Simi | Set Decoration |
| Luciano Martino | Story |
| Sergio Leone | Story |
| Sergio Corbucci | Story |
| Ennio De Concini | Screenplay |
| Luciano Martino | Screenplay |
| Franco Rossetti | Screenplay |
| Sergio Corbucci | Screenplay |
| Duccio Tessari | Screenplay |
| Sergio Leone | Screenplay |
| Adriano Bolzoni | Dialogue |
| Guido Zurli | First Assistant Director |
| Roberto Fizz | First Assistant Director |
| Mimmola Girosi | First Assistant Director |
| Renata Clerici | Script Supervisor |
| Eschilo Tarquini | Script Supervisor |
| G.B. Poletto | Still Photographer |
| Gianni Di Stolfo | Production Secretary |
| Francesco Merli | Production Secretary |
| Alberto Giommarelli | Production Secretary |
| Benito Stefanelli | Master at Arms |
| Mario Van Riel | Makeup Artist |
| Anna Cristofani | Hairstylist |
| Adriana Masseroni | Seamstress |
| Romolo Romagnoli | Key Grip |
| Remo Dolci | Gaffer |
| Lamberto Verdenelli | Special Effects |
| Saverio D'Eugenio | Production Design |
| Hanzi Axerio | Assistant Set Decoration |
| Gianfranco Lowle | Assistant Set Decoration |
| Cesare Rovatti | Costume Design |
| Mario Musy Glori | Production Manager |
| Dario Di Palma | Second Unit Director of Photography |
| Stelvio Massi | Camera Operator |
| Emilio Giannini | Camera Operator |
| Franco Giraldi | Second Unit Director |
| Franco Palaggi | Production Manager |
| Alessandro Jacovoni | Producer |
| Roberto Moretti | Unit Manager |
| Sergio Borelli | Unit Manager |
| Thea Boggiatto | Makeup Artist |
| Vittorio Musy Glori | Line Producer |
