Lucy Boynton (born 17 January 1994) is a British-American actress. She made her film debut as the young Beatrix Potter in Miss Potter (2006). She went on to feature in the films Copperhead (2013), Sing Street (2016), Murder on the Orient Express (2017) and Apostle (2018), before portraying Mary Austin in the biographical film Bohemian Rhapsody (2018).