Juliette Lake Lewis (born June 21, 1973) is an American actress, singer, and musician. She is known for her portrayals of offbeat characters, often in films with dark plots, themes, and settings. Lewis gained prominence in American cinema during the early 1990s, appearing in various independent and arthouse films. She has received various accolades, including nominations for an Academy Award, a Golden Globe Award, and two Primetime Emmy Awards.

The daughter of actor Geoffrey Lewis, Lewis began her career in television at age 14 before making her film debut in My Stepmother Is an Alien (1988). This was followed by bigger parts in National Lampoon's Christmas Vacation (1989) and Martin Scorsese's Cape Fear (1991), the latter of which earned her an Oscar nomination for Best Supporting Actress. Subsequent credits included Husbands and Wives (1992), Kalifornia, What's Eating Gilbert Grape (both 1993), Natural Born Killers (1994), Strange Days (1995), and From Dusk Till Dawn (1996).

Lewis received an Emmy Award nomination for the television film Hysterical Blindness (2002), and went on to co-star in the mainstream features Enough (2002), Cold Creek Manor, Old School (both 2003), and Starsky & Hutch (2004). She embarked on a musical career in 2003, forming the rock band Juliette and the Licks. Since 2009, she has been releasing material as a solo artist. Her film credits during the 2010s included Conviction (2010), The Switch (2010), August: Osage County (2013), and Ma (2019). Lewis has worked more frequently in television since the mid 2010s, appearing in major roles on series such as Wayward Pines (2015), Secrets and Lies (2015–2016), Queer as Folk, Welcome to Chippendales (both 2022), and Yellowjackets (2021–2023).