Kit Harington as Milo

Emily Browning as Cassia

Adewale Akinnuoye-Agbaje as Atticus

Kiefer Sutherland as Corvus

Carrie-Anne Moss as Aurelia

Jared Harris as Severus

Jessica Lucas as Ariadne

Sasha Roiz as Proculus

Currie Graham as Bellator

Joe Pingue as Graecus

Ron Kennell as The Weasel

Rebecca Eady as Milo's Mother

Jean Frenette as Boss Slaver

Dylan Schombing as Young Milo

Maxime Savaria as Biggest Thracian

Tom Bishop Sr. as Cassia's Carriage Driver

Jean-François Lachapelle as Milo's Father

Dalmar Abuzeid as Felix

Emmanuel Kabongo as African Gladiator

Brock Johnson as Flashback Centurion

Kristina Nicoll as Rich Wife #1

Janine Theriault as Rich Wife #2

Mark Whelan as Ship's Captain

Anaïs Frenette as Harbor Child

Donna Christo as Harbor Mother

Thomas Stumpo as Harbor Boy

Rodney Alexandre as Gladiator (uncredited)

Melantha Blackthorne as Celtic Woman (uncredited)

Zachary Burke as Proclaimer (uncredited)

Milan Carmona as Roman Boy (uncredited)

Jimmy Chimarios as Gladiator (uncredited)

Jay Da Costa as Roman Citizen (uncredited)

Chris Gonsalves as Roman Archer (uncredited)

Patrick Kerton as Celtic Gladiator (uncredited)

Johnny Larocque as Soldier (uncredited)

Alain Moussi as Celtic Gladiator (uncredited)

Harrison Astroff as Amphitheatre Spectator (uncredited)