The Heart of a Siren

Barbara La Marr

Isabella Echevaria

Conway Tearle

Gerald Rexford

Harry T. Morey

John Strong

Paul Doucet

Mario Gonzalez

Florence Auer

Lisette

Ida Darling

Mrs. Rexford - Duchess of Chatham

William Ricciardi

Isabella's Uncle Emilio

Clifton Webb

Maxim

Florence Billings

Lady Louise Calvert

Michael Rayle

Pierre

Tammany Young

Pickpocket (uncredited)