Teresa Gallagher is a British actor and the voice ofNicole Watterson. She has voiced characters on Little Miss Chatterbox, Little Miss Naughty and much more. She has also appeared in the UK episodes of The Mr. Men Show, Footballer's Wives, and Casualty. "Thomas & Friends"
- The Bill as Ellen Smith
- Footballers' Wives as Sarah
- Casualty as Alison Canning
- Various female characters from Thomas and Friends special Hero of the Rails (UK only).
- Various female characters from The Mr. Men show.
- Nicole Watterson & Penny on the UK workprints. from The Amazing World of Gumball.
- Emily, Mavis, Rosie, Alicia Botti, and Belle from "Thomas & Friends" Seasons 13 and up
- Samantha Katzwell in The Crazy World of Brownie and Taylor.