
Helen Virginia Horton (November 21, 1923 – September 28, 2007) was an American actress. She was born in Chicago and had a brief career in New York. She married 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."

Alien
1979 · as Mother (voice)

Superman III
1983 · as Miss Henderson

The Razor's Edge
1984 · as Red Cross Lady

Phase IV
1974 · as Mildred Eldridge

Satisfaction Guaranteed
1966 · as Brenda Claffern

Endless Night
1972 · as Aunt Beth

The Woman He Loved
1988 · as Martha

Let's Be Happy
1957 · as Sadie Whitelaw

The Best of Friends
1980 · as Mrs Lovsky

Widows' Nest
1977 · as Ana

The Chairman
1969 · as Susan Wright

The Last Shot You Hear
1969 · as Dodie Rubens

The Mark of the Hawk
1957 · as Barbara Craig

Never Take Sweets from a Stranger
1960 · as Sylvia Kingsley

Forgotten Prisoners: The Amnesty Files
1990 · as ALA Group Leader

Strange Stories
1953 · as Marie ('Strange Journey')

The Pueblo Affair
1970 · as Mrs. Bucher

Reunion at Fairborough
1985 · as Mrs Bigard