St Trinian's is a 2007 British comedy film and the sixth in a long-running series of British films based on the works of cartoonist Ronald Searle and set in St Trinian's School. The first five films form a series, starting with The Belles of St. Trinian's in 1954, with sequels in 1957, 1960, 1966 and a reboot in 1980. The release of 2007, 27 years after the last entry, and 53 years after the first film, is a rebooting of the franchise, rather than a direct sequel, with certain plot elements borrowed from the first film.

St Trinian's is a British gag cartoon comic strip series, created and drawn by Ronald Searle from 1946 until 1952. The cartoons all centre on a boarding school for girls, where the teachers are sadists and the girls are juvenile delinquents. The series was Searle's most famous work and inspired a popular series of comedy films.