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)

William Hurlbut

Theatre Play

Phil Rosen

Director

Fanny Hatton

Screenplay

Frederic Hatton

Screenplay

Elmer J. McGovern

Editor

Rudolph Berquist

Director of Photography