John Joseph Corbett, Jr. (born May 9, 1961) is an American actor and country music singer. He is best known for playing Chris Stevens on Northern Exposure from 1990 to 1995; and Aidan, Carrie Bradshaw's boyfriend, on Sex and the City -- a role which he reprised for the series movie sequel Sex and the City 2. He also played the leading male role opposite Nia Vardalos in Vardalos's hit film, My Big Fat Greek Wedding (2002). He starred in United States of Tara as Max Gregson, and has appeared on NBC dramedy Parenthood as Seth Holt.