Kate got her first acting television role when she made an appearance in Inspector George Gently in 2011 where she played the character Hazel. In 2012 she was cast as recurring character Alex Millar in the fourth series of British supernatural drama Being Human. Bracken starred as Mia in an episode of New Tricks, before returning to film the fifth series of Being Human as a series regular in Barry, Vale of Glamorgan, replacing former star Lenora Crichlow as a new character.
In 2016 Bracken starred in Max McGill's short film Hot Property. In the same year she appeared as Grace in the BBC mini series One of Us.
