Richard Burton as Marcellus Gallio

Jean Simmons as Diana

Victor Mature as Demetrius

Richard Boone as Pontius Pilate

Leon Askin as Abidor

Michael Rennie as Peter

Dean Jagger as Justus

Jay Robinson as Caligula

Torin Thatcher as Sen. Gallio

Betta St. John as Miriam

Jeff Morrow as Paulus

Ernest Thesiger as Emperor Tiberius

Dawn Addams as Junia

Bess Flowers as Spectator at Caligula's court (uncredited)

Pamela Robinson as Lucia (uncredited)

Michael Ansara as Judas (uncredited)

Percy Helton as Caleb, the wine merchant (uncredited)

Nicolas Koster as Jonathan (uncredited)

Thomas Browne Henry as Marius, the physician (uncredited)

Rosalind Ivan as Julia (uncredited)

George E. Stone as Gracchus (uncredited)

Jay Novello as Tiro (uncredited)

Hayden Rorke as Bidder at slave auction (uncredited)

David Leonard as Marcipor (uncredited)

Arthur Tovey as Roman Soldier (uncredited)

Harry Shearer as David (uncredited)

Mae Marsh as Jerusalem Woman Aiding Demetrius (uncredited)

Ben Astar as Cleander (uncredited)

Charles Fogel as Citizen (uncredited)