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Teresa Gallagher is an American-born British actress, voice actress, and singer who is known for her roles in several animated television shows, such as Nicole Watterson, Margaret Robinson, Penny Fitzgerald, and various characters in The Amazing World of Gumball; Annie, Clarabel, Emily, Rosie, Mavis, Gina, Frieda, and numerous characters in Thomas & Friends; Egbert and Gilda in Poppy Cat; EOS and various guest characters in Thunderbirds Are Go; Elias and Helinor in Elias: Rescue Team Adventures; and the Tiddlytubbies in the 2015 reboot of Teletubbies.
For Disney, she voiced Mater's computer in Disney/Pixar's Cars 2 and its video game; the titular character in the U.K. version of Henry Hugglemonster; Dashi in the Disney Junior British series The Octonauts; and Jessica Wright, Mallory, and Lolo Calorie in the Disney XD British/French series Dude, That's My Ghost!.
The roles that explain the career.
37 credits across 2 departments.
| Year | Title | Role | Type |
|---|---|---|---|
| 2025 | Spiked | Acorn Bunny (voice) | Film |
| 2025 | The Wonderfully Weird World of Gumball | Nicole Watterson (voice) | TV |
| 2023 | Isadora Moon | TV | |
| 2023 | Thomas and Friends: The Adventure Begins | Annie and Clarabel / Judy / The Passengers (voice) | Film |
| 2021 | Octonauts and the Ring of Fire | Dashi (voice) | Film |
| 2020 | JoJo & Gran Gran | Cynthia | TV |
| 2020 | Octonauts and the Great Barrier Reef | Dashi (Voice) | Film |
| 2020 | The Gumball Chronicles | Nicole Watterson (voice) | TV |
| 2018 | Thomas & Friends: Big World! Big Adventures! The Movie | Emily / Arizona Diesel / Annie and Clarabel / Rio Crane (voice) | Film |
| 2017 | Thomas & Friends: Journey Beyond Sodor | Emily / Annie and Clarabel (voice) | Film |
| 2016 | Thomas & Friends: The Great Race | Various (voice) | Film |
| 2015 | Thunderbirds Are Go! | EOS (voice) | TV |
| 2015 | Thomas & Friends: Sodor's Legend of the Lost Treasure: The Movie | Emily / Daisy / Annie / Clarabel (voice) | Film |
| 2015 | What's the Big Idea? | 雨果(Hugo)(voice) | TV |
| 2014 | Ronja, the Robber's Daughter | Ronja (voice, English version) | TV |
| 2014 | Thomas & Friends: Tale of the Brave | Emily / Rosie / Annie and Clarabel (voice) | Film |
| 2014 | Postman Pat: The Movie | Lucy Selby (voice) | Film |
| 2013 | Thomas & Friends: King of the Railway | Emily / Belle / Annie and Clarabel (voice) | Film |
| 2013 | The Jungle Book: The Movie | Darzi | Film |
| 2012 | Thomas & Friends: Blue Mountain Mystery | Emily / Mavis / Annie and Clarabel (voice) | Film |
| 2011 | Fleabag Monkeyface | TV | |
| 2011 | Thomas & Friends: Day of the Diesels | Emily / Mavis / Lady Hatt / Belle (voice) | Film |
| 2011 | Poppy Cat | Egbert (voice) | TV |
| 2011 | Cars 2 | Mater's Computer (voice) | Film |
| 2011 | The Amazing World of Gumball | Nicole Watterson / Penny Fitzgerald / Teri / Mrs. Robinson (voice) | TV |
| 2010 | The King's Speech | Nurse | Film |
| 2010 | Rainbow Magic: Return to Rainspell Island | Mrs. Walker / Queen Titania / Fern (Voice) | Film |
| 2010 | Thomas & Friends: Thomas & The Runaway Kite | Emily (voice) / Lady Hatt (voice) / Bridget Hatt (voice) | Film |
| 2010 | Thomas & Friends: The Lion of Sodor | Teacher (voice) / Children (voice) | Film |
| 2010 | Thomas & Friends: Misty Island Rescue | Emily (voice) | Film |
| 2010 | Octonauts | Dashi | TV |
| 2009 | Thomas & Friends: Splish, Splash, Splosh! | Emily (voice) / Rosie (voice) | Film |
| 2009 | Thomas & Friends: Hero of the Rails | Emily / Mavis / The Duchess Of Boxford (voice) | Film |
| 2007 | Frankenstein's Cat | Sweeny | TV |
| 2005 | The Jacket | Nurse Sally | Film |
| 1998 | The Misadventures of Margaret | Astronaught #2 | Film |
| 1984 | Thomas & Friends | Emily (voice) | TV |
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