Tomlinson is the daughter of Judith Hibbert, a singer and Malcom Tomlinson, an actor. She was raised in Beverley, Yorkshire.
Tomlinson's first role was as Daphne in the film, The Falling in 2005. She later went on to play Sophie in The Illusionist and a small role in Einstein and Eddington.
In 2008, she played Jas in Angus, Thongs and Perfect Snogging. She had supporting roles in The Sarah Jane Adventures, Alice in Wonderland and The Lost Future.