The The O.C.'s Mischa Barton will join Rupert Everett, Colin Firth, Lena Headey, Caterina Murino, Stephen Fry, Jodie Whittaker, Celia Imrie, Anna Chancellor, comedian Russell Brand and Toby Jones in the cast of St. Trinians.

The film revolves around an all-girl dormitory. According to The Hollywood Reporter, the young ladies attempt to save their school from a financial crisis.

St. Trinians will be produced and directed by Oliver Parker and Barnaby Thompson. Piers Ashworth and Nick Moorcroft are writing the script.

There is no set release date.