Laura Katherine Parkinson (born 9 March 1978)  

Laura Katherine Parkinson is an English actress and comedian who is known best for playing the part of Jen Barber in the Channel 4 comedy series The IT Crowd. She has contributed sketches for Katy Brand, her friend since studying at Oxford.

Katherine Parkinson studied at Tiffin Girls' School in Kingston upon Thames, Surrey and then read Classics at St Hilda's College, Oxford before moving to the London Academy of Music and Dramatic Art where she met Chris O'Dowd, fellow The IT Crowd lead, for the first time. During her studies she left the course to star in the play The Age of Consent. Her subsequent career has seen her star alongside British actors such as Martin Clunes and Julie Walters. In 2007, she appeared in a new translation of Chekhov's The Seagull at the Royal Court Theatre in London, alongside Kristin Scott Thomas and Mackenzie Crook. She recently contributed sketch characters to Katy Brand's ITV2 show, having been friends with Brand since Oxford. She has also appeared several times on BBC Radio 4, including on Laura Solon: Talking and Not Talking, Mouth Trap, again with Brand, and in The Odd Half Hour.

She also stars in a television advertisement for Maltesers alongside fellow actress and comedienne Amanda Abbington. On New Year's Day 2009 she appeared in a feature-length episode of Jonathan Creek, called The Grinning Man, which was broadcast in the UK. At the end of 2009 she appeared in the acclaimed Cock at the Royal Court Theatre. In 2008 Katherine played Danika Meanwhile in the Doctor Who audio The Death Collectors alongside Sylvester McCoy as the Seventh Doctor. Having played the doctor's receptionist in Series 2-4 of Doc Martin opposite Martin Clunes, Parkinson revealed in 2010 that she would not be returning for the projected fifth series .....

  Wikipedia :  
  1. The IT Crowd (2006-Present)
Role: Jen Barber
  2. The Great Outdoors (2010)
Role: Sophie
  3. St. Trinian's 2: The Legend of Fritton's Gold (2009)
Role: Physics teacher