Helen Virginia Horton (21 November 1923 – 28 September 2009) 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.
Horton attended Northwestern University where she became lifelong friends with Patricia Neal (Helen Benson in The Day the Earth Stood Still). She was well thought of in the drama department and was cast as Viola, the lead role in Twelfth Night, with Neal cast as Olivia, in a university production of the Shakespeare play.
In September 1945, Horton and Neal took a shared apartment in New York and looked for work. They both got parts in a production of Seven Mirrors at the Blackfriars Theatre.
Horton took over from Vivien Leigh as Blanche in A Streetcar Named Desire after the play's London run was completed and it began to tour the United Kingdom. When Neal mentioned the connection to Leigh, she remarked "No one takes over for me, dear. When I leave a play, it's over.":118
- Sie fanden eine Heimat (1953) – Miss Sullivan
- Strange Stories (1953) – Marie
- Sunday Night Theatre (1953–1959, BBC series, 5 episodes) – Ann Wesfield / Dorothy Stafford / Kendall Frayne / Lily Miller / Estelle Quinn
- The Battle of the River Plate (1956) – (uncredited)
- Let's Be Happy (1957, musical film) – Sadie Whitelaw
- The Mark of the Hawk (1957, drama film also known as The Accused) - Barbara Craig
- Never Take Sweets from a Stranger (1960) - Sylvia Kingsley
- Play of the Week (1959–1967, ITV series, 5 episodes) - Mollie / Mona / Mrs. Barker / Mrs. Storch / Sonia Chance
- The Last Shot You Hear (1969) – Dodie Rubens
- The Chairman (1969) – Susan Wright
- The Dick Emery Show (1971–1981, BBC series, 4 episodes)
- Endless Night (1972, crime film) – Aunt Beth
- Phase IV (1974, science-fiction horror film) – Mildred Eldridge
- Nido de viudas (1977) – Ana
- Alien (1979) – Mother (voice)
- Superman III (1983, superhero film) – Miss Henderson
- The Benny Hill Show, 1979–86, ITV series 6 episodes
- The Razor's Edge (1984) – Red Cross lady
- Ellis Island (1984, CBC, 3 episodes) – Miss Pringle
- Reunion at Fairborough (1985, TV Movie)
- Miss Marple (1987, BBC, 1 episode) – Mrs. Cabot
- Bullseye! (1990) – Tourist on Coach
- 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.
- Stephen Michael Shearer (19 May 2006). Patricia Neal: An Unquiet Life. University Press of Kentucky. pp. 37–. ISBN 978-0-8131-3712-4.
- Ann C. Paietta (20 June 2005). Saints, Clergy and Other Religious Figures on Film and Television, 1895–2003. McFarland. pp. 5–. ISBN 978-1-4766-1016-0.