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|Born||Susan Haydn Thomas
18 March 1947
|Died||9 August 2015
Susan Haydn Thomas (March 18, 1947 – August 9, 2015) was a British actress and voice artist. Her voice acting roles included Noddy in Noddy's Toyland Adventures, Princess Sylvia in Muzzy in Gondoland, Trillian in the BBC radio series The Hitchhiker's Guide to the Galaxy and Princess Eilonwy in the animated film The Black Cauldron.
She was born in Newcastle and trained at the Guildhall School of Music and Drama. Sheridan married musician Max Brittain and had three daughters. She died August 8, 2015, after a long illness. She was 68. 
She voiced Alex in the video game Alex Builds His Farm, Shu in the English version of the anime film Fire Tripper and additional characters in Budgie the Little Helicopter, Round the Bend, and The Goose Girl. Other adult characters she gave voice to include Milady in Albert the Fifth Musketeer and Princess Sylvia in the English version of the home video series Muzzy. She was active in theatre with roles in touring companies and a one woman show (The Merry Wife of Wilton). She was in an adaptation of Howl's Moving Castle in London in 2011. Her television roles include an episode of Midsomer Murders in 2011 and an episode of Agony in 1980.
- Hitchhikers actress Susan Sheridan dies aged 68, BBC News, 9 August 2015
- Hitchhiker's Guide To The Galaxy actress Susan Sheridan 'dies peacefully at home' aged 68, The Daily Mail, 9 August 2015.
- "My Voice Overs". Susan Sheridan profile. Retrieved 24 December 2008.
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