Paul Lukas

Character: Philo Vance

Alison Skipworth

Character: Priscilla Kinkaid Llewellyn

Donald Cook

Character: Lynn Llewellyn

Rosalind Russell

Character: Doris Reed

Arthur Byron

Character: Richard Kinkaid

Ted Healy

Character: Police Sergeant Ernest Heath

Eric Blore

Character: Currie

Isabel Jewell

Character: Amelia Llewellyn

Louise Fazenda

Character: Becky

Purnell Pratt

Character: District Attorney John Markham (as Purnell B. Pratt)

Leslie Fenton

Character: Dr. Kane

Louise Henry

Character: Virginia Llewellyn

Leo G. Carroll

Character: Smith (as Leo Carroll)

Charles Sellon

Character: Dr. Doremus

Ernie Adams

Character: Husband of Fat Lady at Auction (uncredited)

Brooks Benedict

Character: Casino Patron (uncredited)

Edna Bennett

Character: Nurse to Lynn (uncredited)

Sidney Bracey

Character: Waiter (unconfirmed) (uncredited)

Wallis Clark

Character: Dr. Elton (uncredited)

William Demarest

Character: Auctioneer (uncredited)

Jay Eaton

Character: Auction Floorman (uncredited)

Lillian Elliott

Character: Mrs. Marting (uncredited)

Pat Flaherty

Character: Watchman (uncredited)

Eddie Hart

Character: Police Detective (unconfirmed) (uncredited)

Grace Hayle

Character: Fat Lady at Auction (uncredited)

Tom Herbert

Character: Reporter (uncredited)

Milton Kibbee

Character: Reporter (uncredited)

Keye Luke

Character: Taki - Casino Pageboy (uncredited)

Alphonse Martell

Character: Roulette Croupier (uncredited)

Bert Moorhouse

Character: Casino Patron (uncredited)

Miki Morita

Character: Japanese Casino Waiter (uncredited)

Pinky Parker

Character: Photographer (uncredited)

Frank Reicher

Character: Assistant Coroner (uncredited)

Dick Rush

Character: Police Detective (uncredited)