Justin Kirk is an American actor. He gained prominence for his roles as Prior Walter in the HBO miniseries Angels in America (2003), for which he received a nomination for the Primetime Emmy Award for Outstanding Supporting Actor in a Miniseries or a Movie, and Andy Botwin in the Showtime dark comedy series Weeds (2005–2012).

Angels in America is a 2003 American HBO miniseries directed by Mike Nichols and based on the Pulitzer Prize–winning 1991 play of the same name by Tony Kushner. Set in 1985, the film revolves around six New Yorkers whose lives intersect. At its core, it is the fantastical story of Prior Walter, a gay man living with AIDS who is visited by an angel. The film explores a wide variety of themes, including Reagan era politics, the spreading AIDS epidemic, and a rapidly changing social and political climate.