An American playboy is sent to a British boarding school to learn discipline.
| Actor | Role |
|---|---|
 Mickey RooneyTimothy Dennis | Timothy Dennis |
 Edmund GwennHeadmaster Justin | Headmaster Justin |
 Ian HunterRoger Carlton | Roger Carlton |
 Freddie BartholomewPeter Carlton | Peter Carlton |
 Marta LindenWinifred Dennis Carlton | Winifred Dennis Carlton |
 Juanita QuigleyJane 'The Runt' Dennis | Jane 'The Runt' Dennis |
 Alan MowbrayMr. Duncan | Mr. Duncan |
 Peter LawfordRonnie Kenvil | Ronnie Kenvil |
 Raymond Severn'Inky' Weeld | 'Inky' Weeld |
| HHarry DuffEton Student (uncredited) | Eton Student (uncredited) |
| RRobert LynnEton Student (uncredited) | Eton Student (uncredited) |
 Tina ThayerFlossie Sampson (uncredited) | Flossie Sampson (uncredited) |
 Alan NapierWillow Club Restauranteur (uncredited) | Willow Club Restauranteur (uncredited) |
 Bess FlowersParty Guest (uncredited) | Party Guest (uncredited) |