Richard Egan as King Leonidas

Ralph Richardson as Themistocles of Athens

Diane Baker as Ellas

Barry Coe as Phylon

David Farrar as Xerxes

Anne Wakefield as Artemisa

Donald Houston as Hydarnes

Anna Synodinou as Gorgo

Robert Brown as Pentheus

Laurence Naismith as First Delegate

Ivan Triesault as Demaratus

Charles Fawcett as Megistias

Michalis Nikolinakos as Myron

Sandro Giglio as Xenathon

Anna Raftopoulou as Toris

Dimos Starenios as Samos

Yorgos Moutsios as Demophilus of Thespiae

Nikos Papakonstantinou as Grellas

Kostas Baladimas as

Zannino as

Kieron Moore as Ephialtes

John Crawford as Agathon the Spartan Spy