Gerard Butler as King Leonidas

Lena Headey as Gorgo

Dominic West as Theron

David Wenham as Dilios

Vincent Regan as Captain

Michael Fassbender as Stelios

Tom Wisdom as Astinos

Andrew Pleavin as Daxos

Andrew Tiernan as Ephialtes

Rodrigo Santoro as Xerxes

Giovani Cimmino as Pleistarchos

Stephen McHattie as Loyalist

Greg Kramer as Ephor #1

Alex Ivanovici as Ephor #2

Kelly Craig as Oracle Girl

Eli Snyder as Leonidas @ 7/8 yrs

Tyler Neitzel as Leonidas @ 15 yrs

Tim Connolly as Leonidas' Father

Marie-Julie Rivest as Leonidas' Mother

Sebastian St. Germain as Fighting Boy (12 years old)

Peter Mensah as Messenger

Arthur Holden as Partisan

Michael Sinelnikoff as Elder Councilman

John Dunn-Hill as Councilman

Dennis St John as Spartan Baby Inspector

Neil Napier as Spartan with Stick

Dylan Smith as Sentry #1

Maurizio Terrazzano as Sentry #2

Robert Paradis as Spartan General

Kwasi Songui as Persian

Alexandra Beaton as Burned Village Child

Frédéric Smith as Statesman

Loucas Minchillo as Spartan Baby A

Nicholas Minchillo as Spartan Baby B

Tom Rack as Ephor #3

David Francis as Ephor #4

James Bradford as Ephor #5

Andrew Shaver as Free Greek-Potter

Robin Wilcock as Free Greek-Sculptor

Kent McQuaid as Free Greek-Blacksmith

Marcel Jeannin as Free Greek-Baker

Jere Gillis as Spartan General #2

Jeremy Thibodeau as Spartan Boy

Tyrone Benskin as Persian Emissary

Robert Maillet as Uber Immortal (Giant)

Patrick Sabongui as Persian General

Leon Laderach as Executioner

Dave Lapommeray as Persian General Slaughtered

Vervi Mauricio as Armless Concubine

Charles Papasoff as Blacksmith

Isabelle Champeau as Mother at Market

Veronique-Natale Szalankiewicz as Daughter at Market (3/5 years old)

Maéva Nadon as Girl at Market

David Thibodeau as Boy #1 at Market

David Schaap as Potter

Jean Michel Paré as Other Council Guard

Stewart Myiow as Persian General

Andreanne Ross as Concubine

Sara Giacalone as Concubine

Ariadne Bourbonnière as Kissing Concubine

Isabelle Fournel as Kissing Concubine

Sandrine Merette-Attiow as Contortionist

Elisabeth Etienne as Dancer

Danielle Hubbard as Dancer

Ruan Vibegaard as Dancer

Geneviève Guilbault as Slave Girl

Bonnie Mak as Slave Girl

Amélie Sorel as Slave Girl

Caroline Aspirot as Slave Girl

Gina Gagnon as Slave Girl

Tania Trudel as Slave Girl

Stéphanie Aubry as Slave Girl

Mercedes Leggett as Slave Girl

Stephania Gambaroff as Slave Girl

Chanelle Lamothe as Slave Girl

Sabrina-Jasmine Guilbault as Slave Girl

Manny Cortez Tuazon as Transsexual (Asian) #1

Cindy as Transsexual (Asian) #2

Atif Y. Siddiqi as Transsexual (Arabian) #3

Camille Rizkallah as Giant with Arrow

Trudi Hanley as Long Neck Woman

Neon Cobran as Litter Bearer/Slave

Gary A. Hecker as Ubermortal Vocals (voice)