Paul Lukas
Philo Vance
Alison Skipworth
Priscilla Kinkaid Llewellyn
Donald Cook
Lynn Llewellyn
Rosalind Russell
Doris Reed
Arthur Byron
Richard Kinkaid
Ted Healy
Police Sergeant Ernest Heath
Eric Blore
Currie
Isabel Jewell
Amelia Llewellyn
Louise Fazenda
Becky
Purnell Pratt
District Attorney John Markham (as Purnell B. Pratt)
Leslie Fenton
Dr. Kane
Louise Henry
Virginia Llewellyn
Leo G. Carroll
Smith (as Leo Carroll)
Charles Sellon
Dr. Doremus
Ernie Adams
Husband of Fat Lady at Auction (uncredited)
Brooks Benedict
Casino Patron (uncredited)
Edna Bennett
Nurse to Lynn (uncredited)
Sidney Bracey
Waiter (unconfirmed) (uncredited)
Wallis Clark
Dr. Elton (uncredited)
William Demarest
Auctioneer (uncredited)
Jay Eaton
Auction Floorman (uncredited)
Lillian Elliott
Mrs. Marting (uncredited)
Pat Flaherty
Watchman (uncredited)
Eddie Hart
Police Detective (unconfirmed) (uncredited)
Grace Hayle
Fat Lady at Auction (uncredited)
Tom Herbert
Reporter (uncredited)
Milton Kibbee
Reporter (uncredited)
Keye Luke
Taki - Casino Pageboy (uncredited)
Alphonse Martell
Roulette Croupier (uncredited)
Bert Moorhouse
Casino Patron (uncredited)
Miki Morita
Japanese Casino Waiter (uncredited)
Pinky Parker
Photographer (uncredited)
Frank Reicher
Assistant Coroner (uncredited)
Dick Rush
Police Detective (uncredited)
Dimitri Tiomkin
Original Music Composer
Edwin L. Marin
Director
S.S. Van Dine
Novel
Florence Ryerson
Screenplay
Edgar Allan Woolf
Screenplay
Lucien Hubbard
Producer
Dimitri Tiomkin
Music
Charles G. Clarke
Director of Photography
Conrad A. Nervig
Editor
Cedric Gibbons
Art Direction
Edwin B. Willis
Assistant Art Director
Joseph C. Wright
Assistant Art Director
Douglas Shearer
Recording Supervision
Dolly Tree
Wardrobe Designer