Basil Rathbone as Montague Hartley

Hugh Herbert as Mr. Penny

Broderick Crawford as Hubert A. Gilmore 'Gil' Smith

Bela Lugosi as Eduardo Vidos

Anne Gwynne as Elaine Winslow

Gladys Cooper as Myrna Hartley

Gale Sondergaard as Abigail Doone

Cecilia Loftus as Henrietta Winslow

Alan Ladd as Richard Hartley

Claire Dodd as Margaret Gordon

John Eldredge as Stanley Borden

Erville Alderson as Doctor Williams (uncredited)

Harry C. Bradley as Coroner (uncredited)

Jack Cheatham as Moving Man #1 (uncredited)

Edgar Sherrod as Minister (uncredited)