Mark Lee Dexter (born 21 April 1973) is an English actor who trained at RADA. Dexter was born in Nottingham, Nottinghamshire, England. As a teenager, he was an early member of the Central Junior Television Workshop which lead to various TV roles before he moved from Nottingham to London to attend RADA. After graduating in 1995, 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 credits, he is probably best known for his portrayals of British Prime Ministers – including David Cameron in the Channel 4 political drama Coalition as well as the 'UK Prime Minister' in Transformers: The Last Knight, and for his role of Timothy Gray in the 1950s-set ITV crime drama The Bletchley Circle, opposite screen wife Anna Maxwell Martin. In 2004, he portrayed astronaut John Pearson in the BBC drama Space Odyssey: Voyage to the Planets.

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