Justin Kirk (born May 28, 1969) is an American stage and film actor. He is known for playing Prior Walter in Mike Nichols's screen adaptation of Angels in America (for which he received an Emmy nomination for Best Supporting Actor in a Mini-Series) and for his portrayal of Andy Botwin in Showtime's Weeds.
His first role on Broadway was a play called Any Given Day, which was performed at the Longacre Theatre. He also appeared in Love! Valour! Compassion! both on-screen and on stage, for which he received an Obie Award for Distinguished Performance in the Ensemble. In addition he won a Back Stage West Garland Award for Outstanding Performance on his role of a piano prodigy in Old Wicked Songs, staged at New York's Promenade Theater and Los Angeles' Geffen Playhouse.