John Nicholas Cassavetes ( KASS -ə-VET-eez; December 9, 1929 – February 3, 1989) was an American actor and filmmaker. He began as a television and film actor before helping to pioneer modern American independent cinema as a director and writer, often financing and distributing his films with his own income. AllMovie called him "an iconoclastic maverick", while The New Yorker suggested in 2013 that he "may be the most influential American director of the last half century."

Cassavetes starred in notable Hollywood films throughout the 1950s and 1960s, including Edge of the City (1957), The Dirty Dozen (1967), and Rosemary's Baby (1968) . He began his directing career with the 1959 independent feature Shadows and followed with independent and critically acclaimed productions such as Faces (1968), Husbands (1970), Minnie and Moskowitz (1971), A Woman Under the Influence (1974), Opening Night (1977), Gloria (1980), and Love Streams (1984). During this time he intermittently continued to act in studio projects such as Elaine May's Mikey and Nicky (1976) and his own directorial works Husbands and Minnie and Moskowitz.

Cassavetes's films employed an actor-centered approach which prioritized raw character relationships and "small feelings" while rejecting traditional Hollywood storytelling, method acting, and stylization. His films became associated with an improvisational, cinéma vérité aesthetic. He collaborated frequently with a rotating group of actors and crew members, including his wife Gena Rowlands and friends Peter Falk, Ben Gazzara, and Seymour Cassel. Many of his films were shot and edited in his and Rowlands' own Los Angeles home.

For his role in The Dirty Dozen , Cassavetes received a nomination for the Academy Award for Best Supporting Actor. As a filmmaker, he was nominated for the Academy Award for Best Original Screenplay for Faces (1968) and the Academy Award for Best Director for A Woman Under the Influence (1974). The Independent Spirit Awards named the John Cassavetes Award in his honor.