Once a Crook is a 1941 British crime film directed by Herbert Mason and featuring Gordon Harker, Sydney Howard, Bernard Lee, Kathleen Harrison, and Raymond Huntley.
| Actor | Role |
|---|---|
 Gordon HarkerCharlie Hopkins | Charlie Hopkins |
 Sydney HowardHallelujah Harry | Hallelujah Harry |
 Kathleen HarrisonAuntie | Auntie |
 Carla LehmannEstelle | Estelle |
 Bernard LeeDuke | Duke |
 Cyril CusackBill Hopkins | Bill Hopkins |