Steve Reeves as Ercole (Hercules)

Sylva Koscina as Iole, bride of Ercole

Sylvia Lopez as Queen Onfale, of Lidia

Gabriele Antonini as Ulisse, son of Laertes

Primo Carnera as Anteo, the giant

Patrizia Della Rovere as Penelope

Sergio Fantoni as Eteocle

Fulvia Franco as Anticlea

Carlo D'Angelo as Creonte, High Priest of Thebes

Marisa Valenti as Blond Slave Girl

Mimmo Palmara as Polinice

Elda Tattoli as Altmea - Mother of Ulisses' Girlfriend

Daniele Vargas as Anfiarao

Andrea Fantasia as King Laerte

Gino Mattera as Orpheo

Aldo Fiorelli as Argos - the Shipbuilder

Gianni Loti as Sandone - Captain of the Lidian Guard

Cesare Fantoni as Oedipus - King of Thebes

Ugo Sasso as Polinice's Officer

Angelo Zanolli as Admeo

Sergio Ciani as Megreo - Officer Eating Apple

Aldo Pini as Tifi - Pilot of the Argos

Nando Cicero as Lastene

Willi Colombini as

Fulvio Carrara as

Walter Grant as Aesculapio

Colleen Bennet as Ballerina at Omphale's Palace

Giuliano Gemma as Melanippo (uncredited)

Mario Ghignone as Councilor of Eteocles (uncredited)

Nino Marchetti as Fossore (uncredited)

Fabrizio Mioni as Jason (uncredited)