Fredric March
Marcus Superbus - Prefect of Rome
Claudette Colbert
Empress Poppaea
Charles Laughton
Emperor Nero Claudius Caesar
Harry Beresford
Favius Fontelas
Ferdinand Gottschalk
Glabrio
Richard Alexander
Viturius
Clarence Burton
Servillius
Henry Brandon
Colosseum Spectator (uncredited)
John Carradine
Christian Martyr / Gladiator Leader / Voice in Coliseum Mob (uncredited)
Dave O'Brien
Christian on Stairway (uncredited)
Sally Rand
Crocodiles' Victim (uncredited)
Arthur Shields
Chaplain Costello (1944 Re-Release Prologue) (uncredited)
Tom Tully
Hoboken (1944 Re-Release Prologue) (uncredited)
Lionel Belmore
Bettor of 300 Silver
