Janel Meilani Parrish Long (born October 30, 1988) is an American actress and singer, who is best known for starring as Mona Vanderwaal in the mystery-drama franchise Pretty Little Liars (2010–2017, 2019) and as Margot Covey in the To All the Boys film series (2018–2021). She also portrayed Young Cosette in the Broadway production of Les Misérables (1996), and Jade in the teen comedy film Bratz (2007).