Sam Worthington
Perseus
Gemma Arterton
Io
Mads Mikkelsen
Draco
Alexa Davalos
Andromeda
Jason Flemyng
Calibos / Acrisius
Ralph Fiennes
Hades
Liam Neeson
Zeus
Pete Postlethwaite
Spyros
Polly Walker
Cassiopeia
Ashraf Barhom
Ozal
Elizabeth McGovern
Marmara
Nicholas Hoult
Eusebios
Liam Cunningham
Solon
Hans Matheson
Ixas
Vincent Regan
Kepheus
Alexander Siddig
Hermes
Luke Treadaway
Prokopion
Mouloud Achour
Kucuk
Tine Stapelfeldt
Danae
Luke Evans
Apollo
Izabella Miko
Athena
Ian Whyte
Sheikh Sulieman
Katherine Loeppky
Aged Cassiopeia
Sinead Michael
Tekla
Ross Mullan
Pemphredo
Robin Berry
Enyo
Graham Hughes
Deino
Martin McCann
Phaedrus
Rory McCann
Bello
Kaya Scodelario
Peshet
Tamer Hassan
Ares
Danny Huston
Poseidon
William Houston
Ammon
Jamie Sives
Captain
Phil McKee
Harbourmaster
Geoffrey Beevers
Noble (Basilica)
Michael Grady-Hall
Citizen (Argos)
Laura Kachergus
Citizen (Argos)
Adrian Bouchet
Soldier (Zeus Statue)
David Kennedy
Kepheus' General
Nina Young
Hera
Jane March
Hestia
Nathalie Cox
Artemis
Agyness Deyn
Aphrodite
Natalia Vodianova
Medusa
Charlotte Comer
Demeter
Louis Leterrier
Kraken (uncredited)
Katrina Vasilieva
Exotic Dancer (uncredited)