Joshua Daniel Hartnett was born in Saint Paul, Minnesota, to Wendy Anne (Kronstedt) and Daniel Thomas Hartnett, a building manager. His father is of Irish and German descent, and his mother is of Swedish and Norwegian ancestry. Hartnett graduated from South High School in Minneapolis in June of 1996, then attended SUNY Purchase in New York. By April of 1997, he was offered the role of Michael Fitzgerald in the short-lived American television series Cracker: Mind Over Murder (1997). Josh started off doing small plays and national commercials, but broke into the big-screen movie business with his starring roles in Halloween H20: 20 Years Later (1998), The Faculty (1998), and Pearl Harbor (2001).