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)

Gregory La Cava