Hilary Mary "Britt" Allcroft (gebore 14 Desember 1943) is 'n Engelse aktrise, skryfster, en vervaardiger. Sy is bekend vir haar rolle in die rolprente Thomas and the Magic Railroad (2000) en Mumfie's Quest: The Movie (2014), en in die televisiereekse Thomas & Friends (1984) en Shining Time Station (1989).
- 1995: The Thomas the Tank Engine Man
- 2000: Thomas and the Magic Railroad
- 2008: Thomas & Friends: The Great Discovery - The Movie
- 2010: Thomas & Friends: Misty Island Rescue
- 2011: Thomas & Friends: Day of the Diesels
- 2012: Thomas & Friends: Blue Mountain Mystery
- 2012: Thomas & Friends: A Very Thomas Christmas
- 2012: Thomas & Friends: Sticky Situations
- 2014: Mumfie's Quest: The Movie
- 2015: Thomas & Friends: Sodor's Legend of the Lost Treasure
- 2016: Thomas & Friends: The Great Race
- 2017: Thomas & Friends: Journey Beyond Sodor
- 2017: Thomas and The 2 Brothers
- 2018: Thomas & Friends: Big World! Big Adventures! The Movie
- 1964: Three Go Round
- 1984: Thomas & Friends
- 1989: Shining Time Station
- 1994: Magic Adventures of Mumfie
- 1996: Mr. Conductor's Thomas Tales
- 1998: The Adventures of Captain Pugwash
- 1999: Storytime with Thomas
- 2015: Whisker Haven Tales with the Palace Pets
- 1990: Shining Time Station: 'Tis a Gift
- 1995: Shining Time Station: Once Upon a Time
- 1995: Shining Time Station: One of the Family
- 1995: Shining Time Station: Queen for a Day
- 1995: Shining Time Station: Second Chances
- 2009: Thomas & Friends: Splish, Splash, Splosh!
- 1993: A Day in the Life of the Jukebox Band
- 1993: A Jukebox Lullaby
- 1994: Schemer Presents: The World According to Me
- 1994: Thomas & Friends: Percy's Ghostly Trick
- 1994: Thomas & Friends: James Goes Buzz Buzz
- 1999: 10 Years of Thomas & Friends
- 2004: Thomas & Friends: Best of Gordon
- 2005: Thomas & Friends: Hooray For Thomas
- 2005: Thomas & Friends: Calling All Engines!
- 2005: Thomas & Friends: Percy Saves the Day & Other Adventures
- 2006: Thomas & Friends: Halloween Adventures
- 2006: Thomas & Friends: On Site with Thomas and Other Adventures
- 2008: Thomas & Friends: Mud Glorious Mud
- 2009: Thomas & Friends: Hero of the Rails
- 2009: Thomas & Friends: Holiday Express
- 2009: Thomas & Friends: Percy and the Bandstand
- 2010: Thomas & Friends: The Best of Thomas
- 2010: Thomas & Friends: The Greatest Stories
- 2012: Thomas & Friends: Engine Friends
- 2013: Thomas & Friends: King of the Railway
- 2013: Thomas & Friends: Animals Aboard!
- 2014: Thomas & Friends: Tale of the Brave
- 2014: Thomas & Friends: Engines to the Rescue
- 2015: Thomas & Friends: The Adventure Begins
- 2015: Thomas & Friends: Whale of a Tale and Other Sodor Adventures
- 2015: Thomas & Friends: Wild Water Rescue and Other Engine Adventures
- 2015: Thomas & Friends: Fantastic Friends
- 2015: Thomas & Friends: Thomas' Christmas Carol
- 2015: Thomas & Friends: Tales on the Rails
- 2016: Thomas & Friends: Start Your Engines!
- 2016: Thomas & Friends: Tinsel on the Tracks
- 2016: Thomas & Friends: Full Steam to the Rescue!
- 2017: Thomas & Friends: Extraordinary Engines
- 2017: Thomas & Friends: Tales from the Rails
- 2017: Thomas & Friends: Team Up with Thomas
- 2017: Thomas & Friends: Christmas on Sodor
- 2017: Thomas & Friends: Thomas' Holiday Collection
- 2018: Thomas & Friends: Danger at the Docks
- 2018: Thomas & Friends: On the Go With Thomas
- 2018: Thomas & Friends: Here Comes the Steam Team!