Paul Muni as Professor Joseph Elsner

Merle Oberon as George Sand

Cornel Wilde as Frédéric Chopin

Nina Foch as Constantia

George Coulouris as Louis Pleyel

Howard Freeman as Friedrich Kalkbrenner

Stephen Bekassy as Franz Liszt

Sig Arno as Henri Dupont (uncredited)

Dawn Bender as Isabelle Chopin - Age 9 (uncredited)

David Bond as Lackey (uncredited)

Walter Bonn as Major Domo (uncredited)

Eugene Borden as Duke of Orleans (uncredited)

William Challee as Titus (uncredited)

Paul Conrad as Waiter (uncredited)

Gino Corrado as Man at Pleyel's (uncredited)

Peter Cusanelli as Balzac (uncredited)

Norma Drury as Duchess of Orleans (uncredited)

Claire Du Brey as Madame Mercier (uncredited)

Earl Easton as Albert (uncredited)

Fern Emmett as Madame Lambert (uncredited)

Franklyn Farnum as Guest at Pleyel Hall Concert (uncredited)

Gregory Gaye as Young Russian (uncredited)

John George as Servant (uncredited)

Fay Helm as Madame Chopin (uncredited)

Stuart Holmes as Concert Attendee (uncredited)

Zoia Karabanova as Countess (uncredited)

Charles La Torre as Postman (uncredited)

Al Luttringer as De La Croux (uncredited)

George Macready as Alfred DeMusset (uncredited)

Darren McGavin as Student (uncredited)

Sybil Merritt as Isabelle Chopin (uncredited)

William H. O'Brien as Guest at Salon Concert (uncredited)

Frank O'Connor as Guest at Duke of Orleans (uncredited)

Alfred Paix as Headwaiter (uncredited)

Frank Puglia as Monsieur Jollet (uncredited)

William Richardson as Jan (uncredited)

Roxy Roth as Paganini (uncredited)

Cosmo Sardo as Lackey (uncredited)

Henry Sharp as Russian Count (uncredited)

Maurice Tauzin as Frédéric Chopin - Age 10 (uncredited)

Victor Travis as Man at Berlin Concert (uncredited)

Ivan Triesault as Monsieur Chopin (uncredited)

Dorothy Vernon as Guest at 1st Pleyel Concert (uncredited)

Michael Visaroff as Russian Governor (uncredited)

Lucy Von Boden as Window Washer (uncredited)

Charles Wagenheim as Waiter (uncredited)

Eric Wilton as Guest at Salon Concert (uncredited)

Ian Wolfe as Pleyel's Clerk (uncredited)