Michael Kirk Douglas (born September 25, 1944) is an American actor and film producer. He has received numerous accolades, including two Academy Awards, five Golden Globe Awards, a Primetime Emmy Award, the Cecil B. DeMille Award, and the AFI Life Achievement Award.

The elder son of Kirk Douglas and Diana Dill, Douglas received his Bachelor of Arts in drama from the University of California, Santa Barbara. His early acting roles included film, stage, and television productions. Douglas first achieved prominence for his performance in the ABC police procedural television series The Streets of San Francisco, for which he received three consecutive Emmy Award nominations. In 1975, Douglas produced One Flew Over the Cuckoo's Nest, having acquired the rights to the Ken Kesey novel from his father. The film received critical and popular acclaim, and won the Academy Award for Best Picture, earning Douglas his first Oscar as one of the film's producers.

Douglas went on to produce films including The China Syndrome (1979) and Romancing the Stone (1984), for which he received the Golden Globe Award for Best Motion Picture – Musical or Comedy, and The Jewel of the Nile (1985). Douglas received critical acclaim for his portrayal of Gordon Gekko in Oliver Stone's Wall Street (1987), for which he won the Academy Award for Best Actor (a role he reprised in the sequel Wall Street: Money Never Sleeps in 2010). Other notable roles include in A Chorus Line (1985), Fatal Attraction (1987), The War of the Roses (1989), Basic Instinct (1992), Falling Down (1993), The American President (1995), The Game (1997), Traffic (2000), Wonder Boys (2000), Solitary Man (2009).

In 2013, for his portrayal of Liberace in the HBO film Behind the Candelabra, he won the Primetime Emmy Award for Outstanding Lead Actor in a Miniseries or a Movie. Douglas starred as an aging acting coach in the Netflix comedy series The Kominsky Method (2018–2021), for which he won a Golden Globe Award for Best Actor – Television Series Musical or Comedy. He has portrayed Hank Pym in the Marvel Cinematic Universe, appearing in the films Ant-Man (2015), Ant-Man and the Wasp (2018), Avengers: Endgame (2019), and Ant-Man and the Wasp: Quantumania (2023). He also voiced an alternate version of the character in the MCU animated television series What If...?.

Douglas has received notice for his humanitarian and political activism. He sits on the board of the Nuclear Threat Initiative, is an honorary board member of the anti-war grant-making foundation Ploughshares Fund and he was appointed as a United Nations Messenger of Peace in 1998. He has been married to actress Catherine Zeta-Jones since 2000.