Gemma Chan (born 29 November 1982) is a British film, television, and theatre actress and former fashion model. She portrays Charlotte in season four of the Showtime and ITV2 series Secret Diary of a Call Girl; Ruth in Channel 4's Fresh Meat; Mia Bennett in the BBC's Doctor Who "The Waters of Mars" and Soo Lin in Sherlock. She also appeared in Exam and Paramount Pictures' action-thriller Jack Ryan: Shadow Recruit. She stars in Humans, an AMC/Channel 4 science-fiction drama, which premiered in June 2015.
Chan was born at Guy's Hospital in London, England. Her father grew up in Hong Kong and was an engineer. Her mainland Chinese mother, a pharmacist at Guy's Hospital, emigrated from pre-Cultural Revolution Communist China via Hong Kong with her parents (Chan's maternal grandparents) and younger sister, growing up in Greenock, Scotland. Chan was raised near Sevenoaks, a town in west Kent, in South East England and attended Newstead Wood School for Girls in Orpington, in the London Borough of Bromley. She later went on to read law at Worcester College, Oxford.