Sophia Lillis emerged as one of the most compelling young actors of her generation, capturing widespread attention with her nuanced and courageous performance in a major horror franchise. An American actress from Brooklyn, New York, she became a familiar face to audiences worldwide through her portrayal of Beverly Marsh, the resilient heart of the Losers' Club in It and its sequel It: Chapter Two. Her ability to convey deep emotional vulnerability and strength set the stage for a career defined by intriguing and complex roles across film and television.

Born on February 13, 2002, in the Crown Heights neighborhood of Brooklyn, Lillis was raised by her mother, Juliana. Her interest in acting began in childhood, leading her to attend the Lee Strasberg Theatre & Film Institute's Young Actors Program. Her professional debut came with a small role in the 2016 television movie The Lipstick Stain, but it was the following year that her career trajectory changed dramatically. Cast as Beverly Marsh in the blockbuster adaptation of Stephen King's It, Lillis's performance was hailed as a standout, earning her critical praise for bringing depth and poise to the iconic character amidst the film's supernatural horrors.

Capitalizing on this breakthrough, Lillis deftly avoided typecasting by immediately taking on dramatically different projects. She appeared in a supporting role in the acclaimed HBO limited series Sharp Objects, starring alongside Amy Adams and Patricia Clarkson. She then lent her voice to the animated Netflix film The Fearless Vampire Killers, and starred in the coming-of-age film Nancy Drew and the Hidden Staircase. In 2020, she headlined the Netflix series I Am Not Okay with This, playing a teenager grappling with burgeoning telekinetic powers, further showcasing her skill at blending everyday adolescent angst with genre elements.

Lillis continued to expand her range with roles in the independent film The Burning Sea and a supporting part in the major fantasy adventure Dungeons & Dragons: Honor Among Thieves. She also starred in the HBO comedy thriller series The Chair Company, which premiered in 2025. With a career built on selective and varied choices, Sophia Lillis has consistently demonstrated a maturity beyond her years, transitioning seamlessly from a childhood star in a horror phenomenon to a versatile performer capable of anchoring both intimate dramas and large-scale genre projects.