Constance Bennett
Duchess of Florence
Fredric March
Benvenuto Cellini
Frank Morgan
Alessandro, Duke of Florence
Fay Wray
Angela
Vince Barnett
Ascanio
Jessie Ralph
Beatrice
Louis Calhern
Ottaviano
Jay Eaton
Polverino
Paul Harvey
Emissary
Jack Rutherford
Captain of the Guards
Irene Ware
Daughter of the Royal House of Bocci
Lucille Ball
Lady-in-Waiting (uncredited)
Bonnie Bannon
Girl (uncredited)
Lionel Belmore
Court Member (uncredited)
Ward Bond
Palace Guard Finding Cellini's Clothes (uncredited)
Lane Chandler
Jailer (uncredited)
James Flavin
Palace Guard (uncredited)
Bess Flowers
Lady-in-Waiting (uncredited)
Mary Lange
Lady-in-Waiting (uncredited)
Theodore Lorch
Executioner (uncredited)
Russ Powell
Servant (uncredited)
Dewey Robinson
Steward (uncredited)
Constantine Romanoff
Executioner (uncredited)
Harry Wilson
Henchman (uncredited)