Tristan Gemmill (born 1967 in Tunbridge Wells, Kent ) is an English actor, most notable for his role as Dr Adam Trueman on Casualty. He was educated at Holmewood House School, Tunbridge Wells, Kent, up to the age of 13. He then won an Academic Scholarship to Tonbridge School.

Biography

Gemmill is married to actress Emily Hamilton; the couple have a son and two daughters. He announced on Twitter that his wife gave birth to their daughter in September 2010 and a second daughter in 2012. He moved to Australia for a while with his family at the age of 15, returning 10 years later, for his acting career's debut in Britain.

He is best known for his TV work - appearing in former Channel 5 soap opera Family Affairs, Where the Heart Is, BBC Three's Grass and recently for Kay Mellor's drama series Strictly Confidential. He also played DC Mitch Cowen in EastEnders in 2005. Another minor role was as an actor in a crime reconstruction in Lynda La Plante's Trial & Retribution.

In 2001, Gemmill appeared in six episodes of The Bill as corrupt Detective Sergeant Peter Cork, in a storyline following a serial rapist. These episodes saw his character sexually assault DC Kate Spears, romance PC Cass Rickman, and be exposed as colluding with another corrupt officer in sheltering the rapist (played by Michael McKell), only to be killed after being stabbed by the same rapist. He also starred in the final (2002) series London's Burning as fire-fighter Frank Mooney.
In 2005, on ITV, Gemmill starred in Distant Shores, as Duncan, alongside Samantha Bond and Peter Davison, while in 2007, Gemmill he appeared as Dr David York in the Channel 4 drama Cape Wrath.
Gemmill played consultant Adam Trueman in the long-running BBC medical drama Casualty from September 2007 to August 2011. In a "celebrity" edition of Mastermind, aired on BBC 1 on 1 January 2010, Gemmill defeated comedians John Bishop and Ed Byrne and TV presenter Anneka Rice to win the trophy. His specialist subject was the Apollo Moon Landings.

In May and June 2012, he filmed a fantasy adventure movie then titled Mariah Mundi and the Midas Box throughout the South West of England, playing the role of Isambard Black. The movie was released in 2014 as The Adventurer: The Curse of the Midas Box and garnered mostly negative reviews.

On 14 June 2013, it was announced that Gemmill was to take over the lead role as Frank Farmer in the West End musical The Bodyguard replacing Lloyd Owen from 9 September 2013 - March 2014.