John Allen Astin (born March 30, 1930) is an American actor and director who has appeared in numerous stage, television and film roles. He is best known for starring in The Addams Family (1964–1966), as patriarch Gomez Addams, reprising the role in the television film Halloween with the New Addams Family (1977) and the animated series The Addams Family (1992–1993).

Astin starred in the cult classic TV film Evil Roy Slade (1972). Other notable film roles include West Side Story (1961), That Touch of Mink (1962), Move Over, Darling (1963), Freaky Friday (1976), National Lampoon's European Vacation (1985), Teen Wolf Too (1987) and The Frighteners (1996). Astin was nominated for the Academy Award for Best Live Action Short Film for his directorial debut, the comedic short Prelude (1968).He has been married three times. His second wife was actress Patty Duke, and Astin is the adoptive father of Duke's son, actor Sean Astin.