Joshua Hartnett is an American actor. He started off doing small plays and national television commercials, but began his break into the big-screen movie business with his starring role in "Halloween H2O: 20 Years Later". His other film credits include "Pearl Harbor", "Black Hawk Down", "The Faculty", "The Virgin Suicides", "O", "40 Days and 40 Nights", "Hollywood Homicide" and "Sin City".