Britt Allcroft (born Hilary Mary Allcroft, 14 December 1943 – 27 December 2024) was an English writer, producer, director and voice actress. She was the creator of the children's television series Thomas the Tank Engine & Friends (later re-titled Thomas & Friends), Shining Time Station (with Rick Siggelkow), Mr. Conductor's Thomas Tales and Magic Adventures of Mumfie. She also wrote, co-produced and directed the film Thomas and the Magic Railroad (2000).