Jason Isaacs (born 6 June 1963) is an English actor. He is best known for his portrayal of Colonel William Tavington in The Patriot (2000), Michael D. Steele in Black Hawk Down (2001), Lucius Malfoy in the Harry Potter franchise series (2002–2011), Captain Hook in Peter Pan (2003), James Wolfe in Battle of the Brave (2004), Antonio Pérez in The Escorial Conspiracy (2007), Georgy Zhukov in The Death of Stalin (2017), and John Godfrey in Operation Mincemeat (2021).

His television roles include Dr. Hunter Aloysius "Hap" Percy in the Netflix supernatural mystery drama streaming series The OA (2016–2019) and Captain Gabriel Lorca in Star Trek: Discovery (2017–2018).