Paul Lukas
Role: Philo Vance
Alison Skipworth
Role: Priscilla Kinkaid Llewellyn
Donald Cook
Role: Lynn Llewellyn
Rosalind Russell
Role: Doris Reed
Arthur Byron
Role: Richard Kinkaid
Ted Healy
Role: Police Sergeant Ernest Heath
Isabel Jewell
Role: Amelia Llewellyn
Louise Fazenda
Role: Becky
Purnell Pratt
Role: District Attorney John Markham (as Purnell B. Pratt)
Leslie Fenton
Role: Dr. Kane
Louise Henry
Role: Virginia Llewellyn
Leo G. Carroll
Role: Smith (as Leo Carroll)
Charles Sellon
Role: Dr. Doremus
Ernie Adams
Role: Husband of Fat Lady at Auction (uncredited)
Brooks Benedict
Role: Casino Patron (uncredited)
Edna Bennett
Role: Nurse to Lynn (uncredited)
Sidney Bracey
Role: Waiter (unconfirmed) (uncredited)
Wallis Clark
Role: Dr. Elton (uncredited)
William Demarest
Role: Auctioneer (uncredited)
Jay Eaton
Role: Auction Floorman (uncredited)
Lillian Elliott
Role: Mrs. Marting (uncredited)
Pat Flaherty
Role: Watchman (uncredited)
Eddie Hart
Role: Police Detective (unconfirmed) (uncredited)
Grace Hayle
Role: Fat Lady at Auction (uncredited)
Tom Herbert
Role: Reporter (uncredited)
Milton Kibbee
Role: Reporter (uncredited)
Keye Luke
Role: Taki - Casino Pageboy (uncredited)
Alphonse Martell
Role: Roulette Croupier (uncredited)
Bert Moorhouse
Role: Casino Patron (uncredited)
Miki Morita
Role: Japanese Casino Waiter (uncredited)
Pinky Parker
Role: Photographer (uncredited)
Frank Reicher
Role: Assistant Coroner (uncredited)
Dick Rush
Role: Police Detective (uncredited)
