Colin Firth, Emily Watson, Rupert Everett and funnyman Russell Brand are reviving the ST TRINIAN'S movie franchise, a former staple of Britain's revered Ealing studios. The stars will feature in a new comedy about the antics of students at an all-girl's boarding school. The original St Trinian's films, which were all hits in Britain in the late 1950s and early 1960s, were adapted from RONALD SEARLE's books. Watson will take on Joyce Grenfell's teacher character, while Everett will double up as the school's headmistress and herbrother. Both characters were played by ALISTAIR SIM in the original films. CASINO ROYAL stunner Caterina Murino, RICHARD E GRANT and Stephen Fry are also expected to appear in the new film.