Stars (in credits order)
Victor Baring
Andrea Salai
John Benson
Mario D'Oggionno
Ballard Berkeley
Duke Ludovico Sforza
Robert Berkeley
ACTOR
Mark Dignam
Leonardo da Vinci
Stanley Drewitt
Father Angelo
Musetta Fonnereau
Edna Fryer
John Garley
Giovanni Antonio Boltraffio
Sheila Shand Gibbs
Duchess Maria Fortunato Gonzaga
Rosamund Greenwood
Cecilia Gallerani
Sonia Holm
Lucrezia Crevelli
Richard Hurndall
Ambrogio Preda
Hugh Latimer
Vicomte de Tassigny
William Mervyn
A Milanese nobleman
Andrew Osborn
Gian Donato
Elsa Palmer
The Duchess of Mantua
Victor Platt
Tavern keeper
Pamela Skiff
Leslie Wright
A priest
Harold Young
Bellincioni
Marguerite Young