John Mills as Dingle

Cecil Parker as Frome, Headmaster

John Salew as Routledge, a Senior Master

Elizabeth Kentish as Mrs Castle, a School Mistress

Mona Washbourne as Miss Merrow, a School Mistress

Mary Merrall as Miss Wyvern, a School Mistress

Derek Blomfield as Paterson, Sports Master

Jeremy Spenser as Nicky, The Angel Hill Kids

Dorothy Bromiley as Paulette, The Angel Hill Kids

Brian Smith as Ginger, The Angel Hill Kids

Wilfred Downing as Browning, The Angel Hill Kids

Robert Dickens as Morris, The Angel Hill Kids

Dawson France as Crowther, The Angel Hill Kids

Carole Shelley as Peggy, The Angel Hill Kids

Richard O'Sullivan as Lawson, The Angel Hill Kids

Norman Pierce as Publican

Eleanor Summerfield as Barmaid

Bryan Forbes as Organ Salesman

Marjorie Rhodes as Landlady

Eddie Byrne as Mr. Morris

Russell Waters as School Inspector

Joan Benham as Mr. Routledge's Companion (uncredited)