Michael Søren Madsen (September 25, 1957 – July 3, 2025) was an American actor. In addition to his frequent collaborations with Quentin Tarantino—Reservoir Dogs (1992), Kill Bill: Volume 2 (2004), The Hateful Eight (2015), and Once Upon a Time in Hollywood (2019)—he was known for his appearances in films including WarGames (1983), The Natural (1984), The Doors (1991), Thelma & Louise (1991), Free Willy (1993), Species (1995), Donnie Brasco (1997), Die Another Day (2002), Sin City (2005), and Scary Movie 4 (2006). He played voice roles in various video games like Grand Theft Auto III (2001), Narc (2005), the Dishonored series (2012–2017), and Crime Boss: Rockay City (2023). Madsen had seven children including actor Christian Madsen.