Leo Gorcey
— Terence 'Slip' Mahoney
Huntz Hall
— Horace Debussy 'Satch' Jones
Nestor Paiva
— Tony 'Piggy' Locarno
Frankie Darro
— Cousin Jimmy
Gabriel Dell
— Ricky Moreno
Rosemary La Planche
— Daisy Harris
David Gorcey
— Chuck
William Benedict
— Whitey
Nelson Leigh
— Fr. O'Hanlon
Mary Gordon
— Mrs. Mamie Mahoney
Dewey Robinson
— Henchman 'Moose'
Dick Paxton
— Henchman 'Jockey'
Thomas Menzies
— 'Boomer', a boy
Geneva Gray
— Josie, his big sister
Buddy Gorman
— Andrew T. 'Andy' Miller
Benny Bartlett
— Harry 'Jag' Harmon
John Eldredge
— Asst. Dist. Atty. John Willis
Robert Emmett Keane
— Lawyer Felix Crowe
Tom Coleman
— Warehouse Watchman
John Elliott
— The Judge
Wilbur Mack
— Transfusion Doctor
Wade Crosby
— Henchman-Mechanic Mike
Meyer Grace
— White-capped Mechanic-Henchman