"After fierce Roman commander Marcus Vinicius becomes infatuated with beautiful Christian hostage Lygia, he begins to question the tyrannical leadership of the despotic emperor Nero."
Robert Taylor
as Marcus Vinicius
Deborah Kerr
as Lygia
Leo Genn
as Petronius
Peter Ustinov
as Nero
Patricia Laffan
as Poppaea
Finlay Currie
as Peter
Abraham Sofaer
as Paul of Tarsus
Marina Berti
as Eunice
Buddy Baer
as Ursus
Felix Aylmer
as Plautius
Nora Swinburne
as Pomponia
Ralph Truman
as Tigellinus
Norman Wooland
as Nerva
Peter Miles
as Nazarius
Geoffrey Dunn
as Terpnos
Nicholas Hannen
as Seneca
D.A. Clarke-Smith
as Phaon
Rosalie Crutchley
as Acte
John Ruddock
as Chilo
Arthur Walge
as Croton
Elspeth March
as Miriam
Strelsa Brown
as Rufia
Alfredo Varelli
as Lucan
Roberto Ottaviano
as Flavius
William Tubbs
as Anaxander
Pietro Tordi
as Galba
Marika Aba
as Dancer at Nero's Banquet (uncredited)
Adriano Ambrogi
as Wine Bibber (uncredited)
Anna Arena
as Woman (uncredited)
Alfred Baillou
as Christian Prisoner in Arena (uncredited)
Giacomo Barnas
as Senator (uncredited)
Scott R. Beal
as Fisherman (uncredited)
John Binns
as Officer (uncredited)
Francesca Biondi
as Slave Girl (uncredited)
Carlo Borelli
as Noble (uncredited)
Leslie Bradley
as Hasta (2nd Praetorian) (uncredited)
Alfred Brown
as Man (uncredited)
Valentino Bruchi
as Mirmillon (uncredited)
Dante Ciriaci
Frank Colson
Adrienne Corri
as Young Christian Girl (uncredited)
Luca Cortese
as Old Man (uncredited)
David Craig
as Little Boy (uncredited)
Daniel de Jonghe
as Apostle (uncredited)
Liana Del Balzo
Jack Del Rio
Lia Di Leo
as Pedicurist (uncredited)
Franco Fantasia
Cesare Fasulo
Al Ferguson
Enzo Fiermonte
as Mounted Captain (uncredited)
Enrico Formichi
as Man with Wine Cup (uncredited)
John Fostini
as Young Unbaptized Man (uncredited)
Dino Galvani
Richard Garrick
as Slave (uncredited)
Jack George
Carlo Ghisini
as Guard (uncredited)
Trudy Glassford
Joan Griffiths
Robin Hughes
as Christ (voice) (uncredited)
Adam Jennette
Philip Kieffer
Gipsy Kiss
Lee Kresel
Richard Larke
Sophia Loren
as Lygia's Slave (uncredited)
Giovanni Lovatelli
as Banquet Man (uncredited)
Helena Makowska
as Older Woman (uncredited)
Anna Mancini
as Nubian Slave Girl (uncredited)
Michael Mark
Clelia Matania
as Parmenida (uncredited)
Richard McNamara
as Legionnaire (uncredited)
Harriet Medin
Dario Michaelis
as Lydia's Guard (uncredited)
Ernesto Molinari
John Myhers
Vincent Neptune
Anna Maria Padoan
as Young Unbaptized Woman (uncredited)
Louis Payne
Walter Pidgeon
as Narrator (voice) (uncredited)
Aldo Pini
as Headkeeper (uncredited)
Alberto Plebani
as Steward (uncredited)
Paola Quattrini
as Crying Girl (uncredited)
Dino Raffaelli
George Restivo
Alfredo Rizzo
as Hairdresser (uncredited)
Amerigo Santarelli
as Guard Tying the Christians (uncredited)
Leonardo Scavino
Alessandro Serbaroli
Bud Spencer
as Imperial Guard (uncredited)
Raffaele Tana
Elizabeth Taylor
William Taylor
as Guard Captain / Marcus' Guard (uncredited)
Michael Tor
as Centurian (uncredited)
Giuseppe Tosi
as Wrestler (uncredited)
Carlo Tricoli
Renato Valente
Scilla Vannucci
as White Slave Girl (uncredited)
Giuseppe Varni
Dianora Veiga
Harry J. Vejar
Romilda Villani
Maria Zanoli
Christopher Lee
as Chariot Driver (uncredited)
Filippo Spoletini
as (uncredited)
Sam Zimbalist
Producer
Sonya Levien
Screenplay
Robert Surtees
Director of Photography
Mervyn LeRoy
Director
John Lee Mahin
Miklós Rózsa
Original Music Composer
Henryk Sienkiewicz
Novel
William V. Skall
S. N. Behrman
Ralph E. Winters
Editor
Charles E. Parker
Makeup Supervisor
Sydney Guilaroff
Hair Designer
Joan Johnstone
Hugh Gray
Additional Writing
Aurel Milloss
Choreographer
Marta Obolensky
Anthony Mann
Second Assistant Director
Donald Jahraus
Special Effects
Sergio Leone
Second Unit Director
A. Arnold Gillespie
Lyricist
Douglas Shearer
Sound Recordist
Al Goodman
Set Designer
Peter Bolton
Assistant Director
Eugene Zador
Orchestrator
Arthur Lemming
Assistant Camera
Nuno Salvação Barreto
Stunts
Robert B. Lee
Sound
George Pink
Camera Operator
John Schmitz
Piero Cavazzuti
Assistant Sound Designer
Italo Tomassi
Tom Howard
Belita Pechtl Klant
Jean Michon
Alfred Schneider
Stunt Coordinator
George G. Schneider
Edward C. Carfagno
Art Direction
William A. Horning
Hugh Hunt
Set Decoration
Cedric Gibbons
Elso Valentini
Irene Howard
Casting
Mel Ballerino
Herschel McCoy
Costume Design