Demi Gene Moore (/dəˈmiː/ də-MEE; née Guynes; born November 11, 1962) is an American actress. After rising to prominence in the early 1980s, she became the world's highest-paid actress by 1995. Her accolades include a Golden Globe Award, a Screen Actors Guild Award, and nominations for an Academy Award, a British Academy Film Award, and a Primetime Emmy Award. In 2025, she appeared on Time's 100 most influential people in the world list, and will receive a star on the Hollywood Walk of Fame in 2026.

Moore began her career as a model and joined the cast of the soap opera General Hospital in 1981. After departing the show in 1983, she rose to prominence as a member of the Brat Pack, with roles in the films Blame It on Rio (1984), St. Elmo's Fire (1985), and About Last Night... (1986). She emerged a star with her portrayal of a grieving girlfriend in the romance film Ghost (1990), had further box office success with A Few Good Men (1992), Indecent Proposal (1993), and Disclosure (1994), and received a then-unprecedented $12.5 million to star in Striptease (1996). Her output decreased significantly after The Scarlet Letter (1995), The Juror (1996), and G.I. Jane (1997) fell below commercial expectations.

Moore has sporadically held leading roles in arthouse films; supporting roles in Charlie's Angels: Full Throttle (2003), Bobby (2006), Mr. Brooks (2007), Margin Call (2011), and Rough Night (2017); as well as television credits in If These Walls Could Talk (1996), Empire (2017–2018), Feud: Capote vs. The Swans (2024), and Landman (2024–present). She received renewed recognition for her performance as an aging celebrity in the body horror film The Substance (2024), which earned her a Golden Globe and a nomination for the Academy Award for Best Actress.

Moore has been married three times. From 1981 to 1985, she was married to musician Freddy Moore. From 1987 to 2000, she was married to Bruce Willis, with whom she has three daughters. She was married to Ashton Kutcher from 2005 to 2013. Her 2019 memoir, Inside Out, reached number one on The New York Times Best Seller. People magazine named her the most beautiful woman in the world in 2025.

Demi Moore was born Demi Gene Guynes on November 11, 1962, in Roswell, New Mexico. Her biological father, Air Force airman Charles Foster Harmon Sr., deserted her then-18-year-old mother, Virginia (née King), after a two-month marriage before Moore's birth. Charles came from Lanett, Alabama, and Virginia was born in Richmond, California but had grown up in Roswell. Moore's maternal grandmother was raised on a farm in Elida, New Mexico. Moore has deep roots in the South Central and Southern United States, particularly Oklahoma, Arkansas and Georgia. When Moore was three months old, her mother married Dan Guynes, a newspaper advertising salesman who frequently changed jobs; as a result, the family moved many times. In 1967 they had Moore's half-brother Morgan. Moore said in 1991, "My dad is Dan Guynes. He raised me. There is a man who would be considered my biological father who I don't really have a relationship with." Moore has half-siblings from Harmon's other marriages, but she does not keep in contact with them.

Moore's stepfather Dan Guynes married and divorced Virginia twice. On October 20, 1980, a year after their second divorce from each other, Guynes committed suicide. Her biological father Harmon died in 1997 from liver cancer in Brazoria, Texas. Moore's mother had a long arrest record which included drunk driving and arson. Moore broke off contact with her mother in 1989, when she left halfway through a rehab stay Moore had financed at the Hazelden Foundation in Minnesota. Virginia Guynes posed nude for the magazine High Society in 1993, where she spoofed Moore's Vanity Fair pregnancy and bodypaint covers and parodied her clay scene from Ghost. Moore and Guynes reconciled shortly before Guynes died of a brain tumor on July 2, 1998.

Moore spent her early childhood in Roswell, and later, Canonsburg, Pennsylvania. Bob Gardner, a photographer for the Monongahela Daily Herald when Dan Guynes was head of advertising, recalled that Moore "looked malnourished and not so much abused as neglected. That haunting look as a child made me feel uneasy." She suffered from strabismus, which was corrected by two operations, as well as kidney dysfunction. Moore learned that Guynes was not her real father at age 13, when she discovered a marriage certificate and inquired about the circumstances since she "saw my parents were married in February 1963. I was born in '62."

At age 14, Moore returned to her hometown of Roswell and lived with her grandmother for six months before relocating to Washington State, where her recently separated mother was residing near Seattle. Several months later, the family moved again to West Hollywood, California, where Moore's mother took a job working for a magazine distribution company. Moore attended Fairfax High School there. In 2019, she stated she was raped at 15 by landlord Basil Doumas, then 49. Doumas claimed he had paid Moore's mother to get access to Moore to rape her, although Moore said it is unclear if this were true.