Alec Guinness
Marcus Aurelius
Christopher Plummer
Commodus
Norman Wooland
Virgilianus
Virgílio Teixeira
Marcellus
Rafael Luis Calvo
Lentulus
Roland Carey
Barbarian (uncredited)
Margaret Fuller
Part of Court (uncredited)
Mario Ghignone
Gladiators Trainer (uncredited)
Gabriella Licudi
Tauna (uncredited)
Jeffrey O'Kelly
Brother of Livius (uncredited)
Robert Rietti
Opening Narrator (voice / uncredited)
Guy Rolfe
Marius (uncredited)
José Terrón
Soldier on Horse (uncredited)
Friedrich von Ledebur
Barbarian (uncredited)
Patricia Wright
Roman Citizen, Slave Woman (uncredited)
