Tom Ellis (born 17 November 1978 in Cardiff, Wales) is a Welsh actor best known for playing Dr. Oliver Cousins in the BBC soap opera EastEnders and Detective Sergeant Sam Speed in a Life on Mars parody on the The Catherine Tate Show. He was also Sam in the BBC comedy Pulling, and plays Gary in Miranda Hart's BBC2, then BBC1 comedy Miranda.
Other notable roles include Justyn in Channel 4's No Angels and Thomas Milligan in the series three finale of British science-fiction television programme Doctor Who. In 2013, he was cast as Victor Frankenstein ("a brilliant doctor who's trying to find a way to bring his late daughter, Anna, back to life") in the ABC pilot series Gothica, a modern-day supernatural drama.