William Powell as Philo Vance

Mary Astor as Hilda Lake

Eugene Pallette as Detective Heath

Ralph Morgan as Raymond Wrede

Robert McWade as District Attorney Markham

Robert Barrat as Archer Coe

Frank Conroy as Brisbane Coe

Etienne Girardot as Dr. Doremus

James Lee as Liang

Paul Cavanagh as Thomas MacDonald

Arthur Hohl as Gamble the Butler

Helen Vinson as Doris Delafield

Jack La Rue as Eduardo Grassi

Harry Allen as Sandy (uncredited)

Wade Boteler as Desk Sergeant Mellish (uncredited)

Don Brodie as Police Photographer (uncredited)

James Burke as Policeman Who Lets Dog Out (uncredited)

George Chandler as Reporter at Police Station (uncredited)

Spencer Charters as Sergeant Snitkin (uncredited)

Virginia Dabney as Girl (uncredited)

Milton Kibbee as Reporter (uncredited)

Harry Morgan as Gamble (uncredited)

Henry O'Neill as Dubois (uncredited)

Paul Panzer as Baggage Clerk (uncredited)

Cliff Saum as Policeman on Night Patrol (uncredited)

Skippy as Terrier at Dog Show (uncredited)

Arthur Thalasso as Detective (uncredited)

Monte Vandergrift as Detective (uncredited)

Leo White as Chicago Hotel Clerk (uncredited)

Renee Whitney as Telephone Operator (uncredited)

Charles C. Wilson as Detective Hennessy (uncredited)