Actress Mischa Barton has signed up to appear alongside Rupert Everett in the new St Trinian's movie.
The 21-year-old, who shot to fame in American teen drama The O.C, will return to the classroom playing J.J. French in the new comedy about the antics of students at an all-girl's boarding school.
As well as Everett, Barton's co-stars include Colin Firth, Emily Watson, comedian Russell Brand and model Lily Cole.
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.