Demi Gene Moore ( də-MEE; née Guynes; born November 11, 1962) is an American actress. After making her film debut in 1981, Moore appeared on the soap opera General Hospital (1982–1984) and subsequently gained recognition as a member of the Brat Pack with roles in Blame It on Rio (1984), St. Elmo's Fire (1985), and About Last Night... (1986). She had her breakthrough for her starring role in Ghost (1990), the highest-grossing film of that year. Her performance was praised and earned her a Golden Globe nomination.

She had further box-office success in the early 1990s, with the films A Few Good Men (1992), Indecent Proposal (1993), and Disclosure (1994). In 1996, Moore became the highest-paid actress in film history when she received an unprecedented $12.5 million to star in Striptease. She had starring roles in the films The Scarlet Letter (1995), The Juror (1996) and G.I. Jane (1997), all of which were commercially unsuccessful and contributed to a downturn in her career. Her career has since had a resurgence with voice roles in The Hunchback of Notre Dame (1996) and The Hunchback of Notre Dame II (2002) and supporting roles in such films as Charlie's Angels: Full Throttle (2003), Bobby (2006), Mr. Brooks (2007), Margin Call (2011), and Rough Night (2017).

In 2019, she released a memoir titled Inside Out, which became a New York Times Best Seller. Moore has been married thrice, to the musician Freddy Moore and the actors Bruce Willis and Ashton Kutcher. She has three daughters with Willis.