|Born||Mark Lee Dexter
21 April 1973
Nottingham, Nottinghamshire, England, UK
Dexter's early successes were on stage, in particular with two high-profile productions of Tennessee Williams plays, beginning with Sam Mendes' 1995 Olivier Award winning production  of The Glass Menagerie at the Donmar Warehouse in which he played Jim O'Connor. This was soon followed by Trevor Nunn's Tony Award winning production  of Williams' never-before-seen Not About Nightingales, which transferred from London's National Theatre to the Circle in the Square Theatre on Broadway in 1999.
Since then, Dexter has moved primarily into film and television. Among an extensive list of British TV credits, he is probably best known in his home country for playing British Prime Minister David Cameron in the Channel 4 political drama Coalition, and for his role of Timothy Gray in the 1950s set ITV crime drama The Bletchley Circle opposite screen wife Anna Maxwell Martin
In summer 2009, Dexter returned to the National Theatre in London, playing Robin Conway in Rupert Goold's production of J. B. Priestley's Time and the Conways; he followed this by appearing alongside Kevin Spacey in the role of cynical journalist E. K. Hornbeck, a thinly disguised portrayal of H. L. Mencken, in Trevor Nunn's revival of Inherit the Wind, at the Old Vic.
During the first half of 2010, Dexter appeared in the recurring role of businessman Paul Stokes in Coronation Street. He played Count Skriczevinsky in Trevor Nunn's production of Flare Path at the Theatre Royal, Haymarket in 2011. He played a lead role in the 2011 released feature Blooded by Ed Boase.
In December 2012 in the UK (or January 2013 in the USA via BBC America), Dexter appeared as the principal villain, Sir Arthur Donaldson, in the opening episode of BBC's Victorian crime drama Ripper Street.
On 3 March 2013 Dexter portrayed the celebrated polar explorer Ernest Shackleton in episode 9 of the ITV series Mr Selfridge, and later that year he appeared as CIA Agent 'Marlow' in 24: Live Another Day, which was broadcast in the US and UK in spring 2014.
In October 2014 it was announced that Dexter would portray British Prime Minister David Cameron in political drama Coalition, a film for Channel 4 set to be broadcast in the run-up to the UK general election in 2015. It was broadcast on 28 March 2015.
In April 2015 he played David Cameron once again in a new production of Peter Morgan's play The Audience, alongside Kristin Scott Thomas as Queen Elizabeth II, directed by Stephen Daldry. In this production at The Apollo Shaftesbury Avenue, Dexter also played former Prime Minister Tony Blair. 
Dexter was cast as SS Commander 'Dietrich' in the WWII drama The Exception directed by David Leveaux, which had special screenings at the Toronto and Tribeca film festivals (September 2016 & April 2017) ahead of its general release in June 2017.
- Official London Theatre Guide
- Tony Awards.com
- nytimes.com from Allmovie
- Royal National Theatre
- "Spacey Ages Decades for a Role, With His Sarcasm Intact". International Herald Tribune. 7 October 2009. Retrieved 30 September 2016 – via The New York Times.
- Billington, Michael (1 October 2009). "Inherit the Wind". Retrieved 30 September 2016 – via The Guardian.
- "Photo Flash: Miller, Purefoy & Smith Rehearse Flare Path", February 21, 2011. Retrieved 2011-02-21.
- Guide, British Comedy. "Red Dwarf Series X, Episode 1 - Trojan - British Comedy Guide". Retrieved 30 September 2016.
- "Mark Gatiss to play Peter Mandelson in Channel 4 Nick Clegg drama Coalition". Retrieved 30 September 2016.
- "The Audience / West End - Playful Productions". Retrieved 30 September 2016.