Leo Gorcey as Terence Aloysius 'Slip' Mahoney

Huntz Hall as Horace Debussy 'Sach' Jones

Jane Randolph as Marian McCormick

Judy Clark as Mabel Dumbrowski

Bobby Jordan as Bobby

David Gorcey as Chuck

Douglas Fowley as Steve Trent

Marjorie Woodworth as Sally Turner

Charles D. Brown as Father Donovan

Paul Harvey as Patrick McCormick

William Benedict as Whitey (as Billy Benedict)

Mary Gordon as Mrs. Cassidy

Bernard Gorcey as Louie