Isabelle Allen is an English actress. She made her acting debut in the 2010s, playing Young Cosette in the 2012 film Les Misérables. Her debut gained her mainstream recognition. For this, she won the Young Artist Award for Best Performance in a Feature Film – Supporting Young Actress Ten and Under. Her next role came three years later with the movie Lady of Csejte. That same time, she made her first TV appearance in the television movie Guin and the Dragon. From 2015 to 2017, she played Elizabeth on the TV show Hetty Feather. Last year, she played Carrie Delaney in the Netflix series Safe. Other films include The Contract, Let’s Be Evil and Extremis.