Keeley is from Buckinghamshire, England, UK. She appeared in various TV commercials as a child. At the age of 6 Keeley became the youngest actress to appear in Les Miserables in the West End, playing Young Eponine. Locally she has done other stage work, including the title role in the musical Annie. Keeley was almost cast in the dual leading roles in The Parent Trap, being one of the final three actresses in the audition process.