Robert Taylor character Marcus Vinicius
Deborah Kerr character Lygia
Leo Genn character Petronius
Peter Ustinov character Nero
Patricia Laffan character Poppaea
Finlay Currie character Peter
Abraham Sofaer character Paul
Marina Berti character Eunice
Buddy Baer character Ursus
Felix Aylmer character Plautius
Nora Swinburne character Pomponia
Ralph Truman character Tigellinus
Norman Wooland character Nerva
Rosalie Crutchley character Acte
Elspeth March character Miriam
Sophia Loren character Lygia's Slave (uncredited)
Elizabeth Taylor character Christian Prisoner in Arena (uncredited)
Bud Spencer character Imperial Guard (uncredited)
Walter Pidgeon character Narrator
John Myhers character Guard
Alfredo Rizzo character Hairdresser
Leslie Bradley character Hasta - 2nd Praetorian
Adrienne Corri character Young Christian Girl
Enzo Fiermonte character Mounted Captain
Robin Hughes character Christ
Peter Miles character Nazarius
Geoffrey Dunn character Terpnos
Nicholas Hannen character Seneca
D.A. Clarke-Smith character Phaon
John Ruddock character Chilo
Strelsa Brown character Rufia
Alfredo Varelli character Lucan
William Tubbs character Anaxander
Pietro Tordi character Galba
Clelia Matania character Parmenida
Alfred Baillou character Christian Prisoner in Arena
Scott R. Beal character Fisherman
Michael Mark character Fisherman
Jack George character Fisherman
Ernesto Molinari character Fisherman
Dino Galvani character Senator
Carlo Borelli character Noble
John Binns character Officer
Alessandro Serbaroli character Officer
Dario Michaelis character Lydia Guard
Kenneth W. Richardson character Guard
Richard McNamara character Legionnaire
Jack Del Rio character Apostle
Philip Kieffer character Apostle
Louis Payne character Apostle
Al Ferguson character Apostle
Lia Di Leo character Pedicurist
Aldo Pini character Headkeeper
Adriano Ambrogi character Wine Bibber
Enrico Formichi character Man with Wine Cup
Giovanni Lovatelli character Banquet Man
Richard Garrick character Slave
Scilla Vannucci character White Slave Girl
Anna Maria Padoan character Young Unbaptized Woman
Alberto Plebani character Steward
David Craig character Little Boy
Helena Makowska character Older Woman
