Steve Reeves

Glaucus Leto

Christine Kaufmann

Elena / Ione

Fernando Rey

Arbaces, High Priest of Isis

Barbara Carroll

Nydia

Anne-Marie Baumann

Julia

Mimmo Palmara

Gallinus, a Praetorian Guard

Guillermo Marín

Ascanius, Consul of Pompei

Carlo Tamberlani

Olinto, Christian Leader

Mino Doro

Consul

María Silva

Julia's Maid

Jesús Puente

Roman Senator

Vicky Lagos

Woman in Red

Ignazio Dolce

Caius

Mario Berriatúa

Praetorian Guard

Mino Doro

Roman Consul

Ángel Aranda

Antoninus Marcus

Mario Morales

Marcus, Military Tribune

Ángel Ortiz

Helios, a Praetorian Guard

Lola Torres

Tavern Keeper

Tony Richards

Antonio Casas

Ignaz Cole

Pedro Fenollar

Announcer

Hank Bergman

Roman Soldier (uncredited)