Lily Newmark started her acting career in the 2010s, initially appearing in short films. In 2014, she had her first feature film role in Return of the Ghost. In the next few years, she worked in several short videos. She later played the role of Ryenne in some episodes of the series Emerald City. She went on to appear in the movies Pin Cushion and Juliet, Naked. In 2018, she played the part of Lexi in the film Solo: A Star Wars Story. That same year, she had performances in the movies Dagenham, Welcome to Mercy, Born a King, and Balance, Not Symmetry. She went on to star as Eve Milton in the miniseries Temple. She also played Ruthie in some episodes of Sex Education. This year, she starred as Pym in the Netflix series Cursed.