From what I can gather on her Twitter, she's living in Worcester now and still active in the theater community (she just got back from Edinburgh Fringe Festival).
Hannah Murray Hannah went on to study at Queens College, Cambridge.
Daniel Kaluuya Dan is just generally hilarious on his Twitter, lives in Camden, writes and raps.
He wrote Thomas's series 3 episode and his music was also featured in JJ's series 4 episode.
Hoult has two movies coming out in 2012--Warm Bodies and Jack the Giant Killer, in which he has the lead.
Joe Dempsie Joe is/was the voice of Clearasil adverts in the UK (LOL forever). Who (series 4 episode 6), playing the character Cline. In 2009, he was in The Damn United with Michael Sheen, Jim Broadbent, Timothy Spall and Stephen Graham.He went on to play Danny Miller in Brittania High, though the show was canceled because of low ratings.Mitch also tried his hand at stage acting in 2009, appearing in Never Forget, a musical based on the songs of boy band Take That, in which he played the stripper Dirty Harry.She also appeared in an episode of Being Human in 2010.She was most recently seen as Jenny in series 2 of Luther alongside ONTD's fave sexy man Idris Elba and just made her Broadway debut reprising her role in Jerusalem.