Claudette Colbert
Cleopatra
Warren William
Julius Caesar
Henry Wilcoxon
Marc Antony
Joseph Schildkraut
King Herod
Gertrude Michael
Calpurnia
Ferdinand Gottschalk
Glabrio (scenes deleted)
Harry Beresford
Soothsayer
Florence Roberts
Lady Flora
Richard Alexander
General Philodemas
William V. Mong
Court Physician
Robert Warwick
General Achillas
Robert Seiter
Aelius (as Robert Manning)
John Carradine
Roman Citizen/Party Guest/Soldier (uncredited) (voice)
Wilfred Lucas
Roman Greeting Antony (uncredited)
David Niven
Slave (uncredited)
Olga Celeste
Slave Girl (uncredited)
