Susan Haydn Thomas (18 March 1947 – 8 August 2015), better known as Susan Sheridan, was a British actress. Her voice acting roles include Noddy in the Cosgrove Hall/BBC Television series Noddy's Toyland Adventures, Trillian in the radio series The Hitchhiker's Guide to the Galaxy and Princess Eilonwy in the animated film The Black Cauldron.

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