Demetrios

Anthony Hall

Princess Antillia

Joyce Taylor

Zaren

John Dall

Captain of the Guard

William Smith

Azor, The High Priest

Edward Platt

Sonoy the Astrologer

Frank DeKova

Surgeon

Berry Kroeger

King Kronas

Edgar Stehli

Petros

Wolfe Barzell

Xandros the Greek Slave

Jay Novello

Narrator / Multiple Voices (voice)

Paul Frees

Andres

Buck Maffei

Andex the Giant

Robert "Big Buck" Maffei

Megalos (uncredited)

Nestor Paiva

Nobleman (uncredited)

John Hart

Girl (uncredited)

Phyllis Douglas

Map Maker

Keith Andes

Governor of Rivers (uncredited)

I. Stanford Jolley

Governor of Animals (uncredited)

Gene Roth

Nobleman (uncredited)

Charles Horvath

Slave (uncredited)

Charles Cirillo

Guard (uncredited)

George Bruggeman

Andex the Giant (uncredited)

Robert 'Big Buck' Maffei

Governor of the Mountains (uncredited)

Byron Morrow

Officer (uncredited)

Will J. White

Pavlo (uncredited)

Ralph Smiley

Governor of Science (uncredited)

Harry Fleer

Norseman Slave (uncredited)

Alan Callow