Gerard Butler

King Leonidas

Lena Headey

Gorgo

Dominic West

Theron

David Wenham

Dilios

Vincent Regan

Captain

Michael Fassbender

Stelios

Tom Wisdom

Astinos

Andrew Pleavin

Daxos

Andrew Tiernan

Ephialtes

Rodrigo Santoro

Xerxes

Giovani Cimmino

Pleistarchos

Stephen McHattie

Loyalist

Greg Kramer

Ephor #1

Alex Ivanovici

Ephor #2

Kelly Craig

Oracle Girl

Eli Snyder

Leonidas @ 7/8 yrs

Tyler Neitzel

Leonidas @ 15 yrs

Tim Connolly

Leonidas' Father

Marie-Julie Rivest

Leonidas' Mother

Peter Mensah

Messenger

Arthur Holden

Partisan

Michael Sinelnikoff

Elder Councilman

John Dunn-Hill

Councilman

Dennis St John

Spartan Baby Inspector

Neil Napier

Spartan with Stick

Dylan Smith

Sentry #1

Maurizio Terrazzano

Sentry #2

Kwasi Songui

Persian

Alexandra Beaton

Burned Village Child

Tom Rack

Ephor #3

David Francis

Ephor #4

James Bradford

Ephor #5

Andrew Shaver

Free Greek-Potter

Robin Wilcock

Free Greek-Sculptor

Kent McQuaid

Free Greek-Blacksmith

Marcel Jeannin

Free Greek-Baker

Jeremy Thibodeau

Spartan Boy

Tyrone Benskin

Persian Emissary

Robert Maillet

Uber Immortal (Giant)

Patrick Sabongui

Persian General

Charles Papasoff

Blacksmith

Isabelle Champeau

Mother at Market

David Schaap

Potter

Jean Michel Paré

Other Council Guard

Stewart Myiow

Persian General

Elisabeth Etienne

Dancer

Geneviève Guilbault

Slave Girl

Stéphanie Aubry

Slave Girl

Atif Y. Siddiqi

Transsexual (Arabian) #3

Gary A. Hecker

Ubermortal Vocals (voice)