Susan Haydn Thomas (18 March 1947 – 8 August 2015), better known as Susan Sheridan, was an English voice actress. Her 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.

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Sheridan trained at the Guildhall School of Music and Drama. Sheridan married the musician Max Brittain and had three daughters.^[1] She died on 8 August 2015, aged 68.^[2]

Sheridan's voice roles include;

• Alex Builds His Farm - Alex
• Fire Tripper (English version) – Shu
• Moomin (English dub) – Moomin
• Noddy's Toyland Adventures – Noddy, Tessie Bear and other character voices
• Budgie the Little Helicopter – Sonia (ep. Down on the Farm), Additional characters
• The Little Polar Bear - Lars
• Round the Bend
• The Goose Girl
• The Family-Ness
• Jimbo and the Jet-Set - Jimbo
• Albert the Fifth Musketeer – Milady
• Muzzy – Princess Sylvia
• Preston Pig – Pumpkin and other character voices
• The Animal Shelf – Timothy, Little Mutt, Getup the Giraffe
• The Beano Video – Dennis the Menace, Walter's Mum / Pink Glove, Minnie the Minx, Boys, Minnie's Fans, Danny, 'Erbert, Fatty, Toots, Wilfrid, Olive, Cheap-o Airways Lady, Ma
• The Beano Videostars – Dennis' Mum, Walter's Mum, Cynthia, Newsreader, Mrs Ramsbottom, Baby #1, Mrs Blenkinsop, Danny, Smiffy, Toots, Olive, Toots’ Mum, Baby #2, Ma, Pedestrian #4, Ivy's Mum, Poolgoer #2
• Father Christmas and the Missing Reindeer – Simon Watson, Wanda
• The Lampies – Livewire, Contact^[3]
• Bye Bye, Lady Liberty – Michael

She was active in theatre with roles in touring companies.

• The Merry Wife of Wilton (1988)
• Howl's Moving Castle (2011) (adaptation)

• Agony (1980)
• Midsomer Murders (2011)
• Sheila Hodgon's Here Am I Where Are You? – A boy (1977)
• The Hitchhiker's Guide to the Galaxy – Trillian