Please Sir! is a 1971 British comedy film directed by Mark Stuart and starring John Alderton, Deryck Guyler and Carol Hawkins. Written by John Esmonde and Bob Larbey, it is a spin-off from the ITV television series Please Sir! (1968–1972). It was released by the Rank Organisation on 10 September 1971.

John Alderton is an English actor. He is best known for his roles in Upstairs, Downstairs, Thomas & Sarah, Wodehouse Playhouse, Little Miss, Please Sir!, No, Honestly and Fireman Sam. Alderton has often starred alongside his wife, Pauline Collins.