 Steve ReevesErcole (Hercules) | Ercole (Hercules) |
 Sylva KoscinaIole, bride of Ercole | Iole, bride of Ercole |
 Sylvia LopezQueen Onfale, of Lidia | Queen Onfale, of Lidia |
 Gabriele AntoniniUlisse, son of Laertes | Ulisse, son of Laertes |
 Primo CarneraAnteo, the giant | Anteo, the giant |
 Patrizia Della RoverePenelope | Penelope |
 Sergio FantoniEteocle | Eteocle |
 Fulvia FrancoAnticlea | Anticlea |
| CCarlo D'AngeloCreonte, High Priest of Thebes | Creonte, High Priest of Thebes |
| MMarisa ValentiBlond Slave Girl | Blond Slave Girl |
 Mimmo PalmaraPolinice | Polinice |
 Elda TattoliAltmea - Mother of Ulisses' Girlfriend | Altmea - Mother of Ulisses' Girlfriend |
 Daniele VargasAnfiarao | Anfiarao |
 Andrea FantasiaKing Laerte | King Laerte |
 Gino MatteraOrpheo | Orpheo |
 Aldo FiorelliArgos - the Shipbuilder | Argos - the Shipbuilder |
| GGianni LotiSandone - Captain of the Lidian Guard | Sandone - Captain of the Lidian Guard |
 Cesare FantoniOedipus - King of Thebes | Oedipus - King of Thebes |
 Ugo SassoPolinice's Officer | Polinice's Officer |
 Angelo ZanolliAdmeo | Admeo |
 Sergio CianiMegreo - Officer Eating Apple | Megreo - Officer Eating Apple |
 Aldo PiniTifi - Pilot of the Argos | Tifi - Pilot of the Argos |
 Nando CiceroLastene | Lastene |
 Willi ColombiniNot listed | Not listed |
| FFulvio CarraraNot listed | Not listed |
| WWalter GrantAesculapio | Aesculapio |
| CColleen BennetBallerina at Omphale's Palace | Ballerina at Omphale's Palace |
 Giuliano GemmaMelanippo (uncredited) | Melanippo (uncredited) |
| MMario GhignoneCouncilor of Eteocles (uncredited) | Councilor of Eteocles (uncredited) |
| NNino MarchettiFossore (uncredited) | Fossore (uncredited) |
