Lily Jane Collins (born 18 March 1989) is a British and American actress. Born in Guildford and raised in Los Angeles, Collins began performing on screen at the age of two in the BBC sitcom Growing Pains. In the late 2000s, Collins began acting and modelling more regularly, and gained recognition for her supporting role in the sports drama film The Blind Side (2009). She went on to star in several films, including the horror film Priest (2011), the thriller Abduction (2011), and the fantasy films Mirror Mirror (2012) and The Mortal Instruments: City of Bones (2013).

Collins was critically acclaimed for her roles as a young actress in the romantic comedy Rules Don't Apply (2016), which earned her a nomination for a Golden Globe Award for Best Actress, and for her portrayal of a young adult with anorexia in the drama To the Bone (2017). She went on to appear in the biopics Extremely Wicked, Shockingly Evil and Vile (2019), Tolkien (2019), and Mank (2020).

Collins played Fantine in the BBC miniseries Les Misérables (2018–2019), and since 2020, she has portrayed marketing executive Emily Cooper in the Netflix romantic comedy series Emily in Paris. For the latter, she received nominations for the Golden Globe Award for Best Actress – Television Series Musical or Comedy and the Primetime Emmy Award for Outstanding Comedy Series (as producer). She has written the memoir Unfiltered: No Shame, No Regrets, Just Me (2017) in which she discussed her struggles with mental health, including an eating disorder she suffered as a teenager.