 Constance BennettDuchess of Florence | Duchess of Florence |
 Fredric MarchBenvenuto Cellini | Benvenuto Cellini |
 Frank MorganAlessandro, Duke of Florence | Alessandro, Duke of Florence |
 Fay WrayAngela | Angela |
 Vince BarnettAscanio | Ascanio |
 Jessie RalphBeatrice | Beatrice |
 Louis CalhernOttaviano | Ottaviano |
 Jay EatonPolverino | Polverino |
 Paul HarveyEmissary | Emissary |
 Jack RutherfordCaptain of the Guards | Captain of the Guards |
 Irene WareDaughter of the Royal House of Bocci | Daughter of the Royal House of Bocci |
 Lucille BallLady-in-Waiting (uncredited) | Lady-in-Waiting (uncredited) |
 Bonnie BannonGirl (uncredited) | Girl (uncredited) |
 Lionel BelmoreCourt Member (uncredited) | Court Member (uncredited) |
 Ward BondPalace Guard Finding Cellini's Clothes (uncredited) | Palace Guard Finding Cellini's Clothes (uncredited) |
 Lane ChandlerJailer (uncredited) | Jailer (uncredited) |
 James FlavinPalace Guard (uncredited) | Palace Guard (uncredited) |
 Bess FlowersLady-in-Waiting (uncredited) | Lady-in-Waiting (uncredited) |
| MMary LangeLady-in-Waiting (uncredited) | Lady-in-Waiting (uncredited) |
 Theodore LorchExecutioner (uncredited) | Executioner (uncredited) |
 Russ PowellServant (uncredited) | Servant (uncredited) |
 Dewey RobinsonSteward (uncredited) | Steward (uncredited) |
 Constantine RomanoffExecutioner (uncredited) | Executioner (uncredited) |
 Harry WilsonHenchman (uncredited) | Henchman (uncredited) |
