Sal Ponti

Demetrios

Joyce Taylor

Princess Antillia

John Dall

Zaren

William Smith

Captain of the Guard

Edward Platt

Azor the High Priest

Frank De Kova

Sonoy the Astrologer

Berry Kroeger

Surgeon

Edgar Stehli

King Kronas

Wolfe Barzell

Petros, Demetrios' Father

Jay Novello

Xandros the Greek Slave

Paul Frees

Narrator / Multiple Voices (voice)

Nestor Paiva

Megalos (uncredited)

John Hart

Nobleman (uncredited)

Phyllis Douglas

Girl (uncredited)

I. Stanford Jolley

Governor of Rivers (uncredited)

Gene Roth

Governor of Animals (uncredited)

Charles Horvath

Nobleman (uncredited)

Charles Cirillo

Slave (uncredited)

George Bruggeman

Guard (uncredited)

Robert 'Big Buck' Maffei

Andex the Giant (uncredited)

Byron Morrow

Governor of the Mountains (uncredited)

Will J. White

Officer (uncredited)

Ralph Smiley

Pavlo (uncredited)

Harry Fleer

Governor of Science (uncredited)

David Dyer

Priest (uncredited)

Alan Callow

Norseman Slave (uncredited)