Justin Kirk is an American TV film actor, noted for movies like Outpatient (2002), Against the Current (2009), Nobody Walks (2012), Justice League: War (2014), and Ghostbusters (2016), The Tribes of Palos Verdes (2017), Vice (2018).

Kirk is known for portraying Prior Walter in Mike Nichols`s acclaimed screen adaptation of Angels in America, for which he was nominated for the Primetime Emmy Award for Outstanding Supporting Actor in a Miniseries or a Movie. Kirk is also known for his portrayal of Andy Botwin on the series Weeds.