William Powell
Philo Vance
Florence Eldridge
Sibella Greene
Jean Arthur
Ada Greene
Eugene Pallette
Sergeant Ernest Heath
E.H. Calvert
District Attorney John F. X. Markham
Ullrich Haupt
Dr. Arthur Von Blon
Gertrude Norman
Mrs. Tobias Greene
Lowell Drew
Chester Greene
Morgan Farley
Rex Greene
Brandon Hurst
Sproot
Augusta Burmeister
Mrs. Gertrude Mannheim
Marcia Harris
Hemmings
Veda Buckland
Nurse (Uncredited)
Shep Camp
Medical Examiner (Uncredited)
Charles E. Evans
Lawyer Canon (Uncredited)
Helena Phillips Evans
Miss O'Brien (Uncredited)
Mildred Golden
Barton (Uncredited)
Harry Strang
Cop in House (Uncredited)