1. Talulah Riley (Annabelle Fritton)
Since St Trinian's, Riley has appeared in films including The Boat That Rocked and Inception.
2. Juno Temple (Celia)
Since 2007, Temple has appeared in films including Wild Child, The Dark Knight Rises, Maleficent, and Magic Mike.
3. Rupert Everett (Carnaby Fritton / Camilla Fritton)
Everett was obviously a massive star before St Trinian's, and he has most recently appeared in the film A Royal Night Out.
4. Gemma Arteton (Kelly)
The year after St Trinian's was released, Arteton appeared in Quantum of Solace as Bond Girl Strawberry Fields. This year, she is due to play the lead role in The Globe's transfer of Nell Gwynn to the Apollo Theatre in London.
5. Jodie Whittaker (Beverly)
Whittaker has recently appeared in TV series including Tess of the D'Urbervilles, Return to Cranford, and Broadchurch.
6. Anna Chancellor (Miss Bagstock)
Chancellor was super famous before this film, but since 2007 she has appeared in TV shows including The Hour and Downton Abbey.
7. Colin Firth (Geoffrey)
Firth was already a national treasure before St Trinian's, but three years after it came out, he won an Oscar for his performance in The King's Speech.
8. Kathryn Drysdale (Taylor)
Drysdale kept her role in Two Pints of Lager and a Packet of Crisps until 2009, and since then has starred in Benidorm and Doctor Who.
9. Toby Jones (The Bursar)
Jones was famously the voice of Dobby in the Harry Potter franchise, and has also appeared in Captain America: The First Avenger, Tinker Tailor Soldier Spy, and The Girl.
10. Antonia Bernath (Chloe)
Bernath has been in films such as The Boat That Rocked and Chariots Of Fire.
11. Fenella Woolgar (Miss Cleaver)
Woolgar recently appeared in the BBC's adaptation of War and Peace, and she's also been in Doctor Who and Agatha Christie's Poirot.
12. Amara Karan (Peaches)
Prior to St Trinian's, Karan appeared in The Darjeeling Limited. Since then, she has had roles in both The Merchant of Venice and The Taming of the Shrew at the RSC.
13. Tamsin Egerton (Chelsea)
Since 2007, Egerton has appeared in Chalet Girl and the TV series Camelot.
14. Caterina Murino (Miss Maupassant)
Muniro played Solange Dimitrios in Casino Royale before St Trinian's, and since then she has appeared in the film version of The Garden Of Eden and the TV series Odysseus.
15. Celia Imrie (The Matron)
Imrie is most well known for her partnerships with Victoria Wood in Pat and Margaret and Dinnerladies. Since 2007, she was notably in The Best Exotic Marigold Hotel.
16. Lily Cole (Polly)
In 2011, Cole was awarded a double first in The History Of Art from Cambridge University. She continues to model and also appeared in The Imaginarium of Doctor Parnassus.
17. Russell Brand (Flash Harry)
Brand has recently become known as a political activist, and he released a political book called Revolution.
18. Lucy Punch (Verity)
Since 2007, Punch has appeared in Are You Ready For Love? and Bad Teacher.
19. Mischa Barton (JJ French)
Barton was famous for her role in The O.C. before this movie. In 2012, she appeared in a stage version of Steel Magnolias in Dublin. She also opened a clothing shop in Shoreditch, London.
20. Cloe and Holly Mackie (Tara and Tania)
The Mackie twins most recently appeared in The Coven.
21. Lena Headey (Miss Dickinson)
Headey is most well known for her role as Queen Cersei Lannister in HBO's Game of Thrones.
22. Paloma Faith (Andrea)
Faith is still a singer, but also appeared in The Imaginarium of Doctor Parnassus and is a judge on the The Voice.
23. Stephen Fry (Himself)
Fry was obviously pretty famous before St Trinian's, and is well known for being the host of QI. He has written books, appeared on TV and in films, been on the radio and in plays, and he did the audio recordings for all the Harry Potter books.
24. Girls Aloud (the school band)
Girls Aloud split up in 2013. Now, Coyle is working on a solo album, Walsh has taken on various West End roles and appeared on Strictly Come Dancing, Roberts is working on solo work, Fernandez-Versini was an X Factor judge and is working on new music, and Harding is currently a contestant on The Jump.