Carry On Sergeant is a 1958 British comedy film about national service starring William Hartnell, Bob Monkhouse and Eric Barker; it is the first in the series of Carry On films, with 31 entries released from 1958 to 1992. The film was based on a play The Bull Boys by R. F. Delderfield and was adapted into a script by Norman Hudis with John Antrobus contributing additional material and replacing the conscripted ballet dancers of the novel with a married couple. It was directed by Gerald Thomas and produced by Peter Rogers, a partnership which would last until 1978. Actors in this film, who went on to be part of the regular team in the series, were Kenneth Williams, Charles Hawtrey, Hattie Jacques, Kenneth Connor and Terry Scott. The film was followed by Carry On Nurse (1959).