Joshua Daniel Hartnett
July 21, 1978
Saint Paul, Minnesota
Hartnett was born in Minnesota and raised mostly by his father, Daniel Hartnett (a building manager), and stepmother, Molly (an artist). He has three younger half-siblings, named Jessica, Jake and Joe and has Irish ancestry. He grew up in Saint Paul and was raised Roman Catholic, attending Nativity of Our Lord Catholic Grade School, where he played Adam Apple in an eighth grade production of "Krazy Kamp". He later attended Cretin-Derham Hall High School before switching to South High School in Minneapolis, Minnesota, from which he graduated in June 1996. Hartnett played football in high school, but stopped because of a broken left knee.
He got his first job at a local video store. But had also worked at McDonalds and Burger King for a short time before getting his start in acting at Youth Performance Company in Minneapolis. He became a vegetarian at the age of 12 but temporarily returned to meat eating during the shooting of The Black Dahlia.