Joshua Daniel Hartnett is an American actor. He began his career playing Michael Fitzgerald on ABC's Cracker (1997–1998), after which he became known as a teen idol through starring parts in films such as Halloween H20: 20 Years Later, The Faculty, The Virgin Suicides (1999), Pearl Harbor, O, Black Hawk Down, and 40 Days and 40 Nights (2002).

Cracker is an American crime drama series based upon the British television crime drama of the same name created by Jimmy McGovern. It stars Robert Pastorelli as criminal psychologist Gerry 'Fitz' Fitzgerald and includes a young Josh Hartnett in his first professional role, appearing in several episodes playing Fitz's eldest child. Robbie Coltrane, the star of the original series, appears as a villain in one episode.