Lucy Boynton is a British-American actress. Raised in London, she made her professional debut as the young Beatrix Potter in Miss Potter (2006). She starred in television productions Ballet Shoes (2007), Sense and Sensibility (2008) and Mo (2010), making guest appearances on Borgia, Endeavour, and Law & Order: UK. Boynton portrayed writer Angelica Garnett on Life in Squares, which aired on BBC. She appeared as an isolated popular girl in The Blackcoat's Daughter (2015) and starred as a bold aspiring model in Sing Street (2016), which met with critical acclaim. She appeared in horror films I Am the Pretty Thing That Lives in the House (2016) and Don't Knock Twice (2016), receiving praise for her performance in the latter. Boynton portrayed J. D. Salinger's wife in Rebel in the Rye (2017), which had a negative reception. She played Countess Andrenyi in Murder on the Orient Express (2017), which was a commercial success. Boynton portrayed an addict in Netflix's Gypsy (2017) and the daughter of a cult leader in Apostle (2018). Boynton gained recognition for starring as Mary Austin in the biopic Bohemian Rhapsody (2018), which received numerous accolades and was a box office success. She appeared in HBO Max's Locked Down (2021). Boynton stars as the privileged antagonist Astrid Sloan in the Netflix series The Politician and appeared in the second season of Modern Love. She will portray singer Marianne Faithfull in the upcoming biopic Faithfull and is currently starring in ITV's The Ipcress File (2022).