John Barrymore

Duke of Charmerace

Lionel Barrymore

Detective Guerchard

Karen Morley

Sonia

John Miljan

Prefect of Police

Tully Marshall

Gaston Gourney-Martin

Henry Armetta

Sheriff's Man

George Davis

Sheriff's Man

John Davidson

Gourney-Martin's Butler

Mary Jane Irving

Marie

Mischa Auer

Louvre Tour Guide (uncredited)

Symona Boniface

Party Guest (uncredited)

Claire Du Brey

Mother at the Louvre (uncredited)

Geraldine Dvorak

Party Guest (uncredited)

Christian J. Frank

Detective (uncredited)

Olaf Hytten

Party Guest (uncredited)

Carl M. Leviness

Party Guest (uncredited)

Theodore Lorch

Lupin's Butler (uncredited)

Frank McLure

Jeweller (uncredited)

Georges Renavent

Duval (uncredited)

Joe Sawyer

Leroux (uncredited)

Philip Sleeman

Museum Guard (uncredited)

Nicholas Soussanin

Martin's Butler (uncredited)

Ellinor Vanderveer

Party Guest (uncredited)

Roland Varno

Jean Moucante (uncredited)

Leo White

Jeweller (uncredited)

Florence Wix

Party Guest (uncredited)