Steve Reeves as Glaucus Leto

Christine Kaufmann as Elena / Ione

Fernando Rey as Arbaces, High Priest of Isis

Barbara Carroll as Nydia

Anne-Marie Baumann as Julia

Mimmo Palmara as Gallinus, a Praetorian Guard

Guillermo Marín as Ascanius, Consul of Pompei

Carlo Tamberlani as Olinto, Christian Leader

Mino Doro as Consul

María Silva as Julia's Maid

Jesús Puente as Roman Senator

Vicky Lagos as Woman in Red

Ignazio Dolce as Caius

Mario Berriatúa as Praetorian Guard

Mino Doro as Roman Consul

Ángel Aranda as Antoninus Marcus

Mario Morales as Marcus, Military Tribune

Ángel Ortiz as Helios, a Praetorian Guard

Lola Torres as Tavern Keeper

Tony Richards as

Antonio Casas as

Ignaz Cole as

Pedro Fenollar as Announcer

Hank Bergman as Roman Soldier (uncredited)