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.

After leaving The Streets of San Francisco in 1976, Douglas went on to produce films including The China Syndrome (1979) and Romancing the Stone (1984). He won the Golden Globe Award for Best Motion Picture – Musical or Comedy for Romancing the Stone, in which he also starred as the romantic lead. Douglas reprised this role in the sequel in 1985, The Jewel of the Nile, which he also produced. He appeared in the musical A Chorus Line (1985) and the psychological thriller Fatal Attraction (1987). 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).

His subsequent film roles included: Black Rain (1989); The War of the Roses (1989); Basic Instinct (1992); Falling Down (1993); The American President (1995); The Game (1997); Traffic and Wonder Boys (both 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, and in the Netflix animated series Green Eggs and Ham, in which he voices Guy-Am-I.

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...?.

Besides his acting career, Douglas has received notice for his humanitarian and political activism, as well as media attention for his marriage to actress Catherine Zeta-Jones.