Helen Virginia Horton (1923-2007) was an American actress. She was born in Chicago and had a brief career in New York. She married Scotsman Hamish Thomson and lived near London. She worked extensively in British television, radio and theatre, and had three children; her granddaughter is the English actress, Lily James. Horton voiced the ship's computer, "Mother", in the 1979 film Alien.
- Sunday Night Theatre, 1953-59, BBC series 5 episodes
- Play of the Week, 1959–67, ITV series 5 episodes
- The Dick Emery Show, 1971–81, BBC series 4 episodes
- Phase IV, a 1974 science-fiction horror film
- Alien (film), 1979, the voice of the spaceship's computer
- Superman III, a 1983 superhero film
- The Benny Hill Show, 1979–86, ITV series 6 episodes
- Ellis Island, 1984, CBC, 3 episodes
- Miss Marple, 1987, BBC, 1 episode
- Hansen, Pal (23 December 2012). "Fallen angel: How Lily James is bringing scandal to Downton Abbey this Christmas". The Independent. Archived from the original on 27 June 2015. Retrieved 16 March 2015.
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