Sophia Loren

Lucilla

Stephen Boyd

Livius

Alec Guinness

Marcus Aurelius

James Mason

Timonides

Christopher Plummer

Commodus

Anthony Quayle

Verulus

John Ireland

Ballomar

Omar Sharif

Sohamus

Mel Ferrer

Cleander

Eric Porter

Julianus

Finlay Currie

Senator

Andrew Keir

Polybius

Douglas Wilmer

Niger

Norman Wooland

Virgilianus

Michael Gwynn

Cornelius

Virgílio Teixeira

Marcellus

Peter Damon

Claudius

Rafael Luis Calvo

Lentulus

Lena von Martens

Helva

Roland Carey

Barbarian (uncredited)

Gabriella Licudi

Tauna (uncredited)

Robert Rietti

Opening Narrator (voice / uncredited)

Guy Rolfe

Marius (uncredited)

José Terrón

Soldier on Horse (uncredited)

Friedrich von Ledebur

Barbarian (uncredited)

Patricia Wright

Roman Citizen, Slave Woman (uncredited)