Claim: Josh Hartnett is a performer.

Joshua Daniel `` Josh '' Hartnett -LRB- born July 21 , 1978 -RRB- is an American actor and movie producer . He first came to attention in 1997 for his role as Michael Fitzgerald in the television crime drama series Cracker . He made his feature film debut in 1998 in the slasher film Halloween H20 : 20 Years Later , followed by teen roles in films such as the sci-fi horror film The Faculty -LRB- 1998 -RRB- and the drama The Virgin Suicides -LRB- 1999 -RRB- . Hartnett had starring roles in the war film Pearl Harbor , the drama O , the war film Black Hawk Down , the romantic comedy 40 Days and 40 Nights , and other films .   He starred in the Brian De Palma -- directed neo-noir crime thriller The Black Dahlia -LRB- 2006 -RRB- . Next , he appeared in the drama Resurrecting the Champ -LRB- 2007 -RRB- , alongside Samuel L. Jackson , the graphic novel -- based vampire horror film 30 Days of Night -LRB- 2007 -RRB- and the neo-noir atmospheric thriller I Come with the Rain -LRB- 2009 -RRB- . From 2014 to 2016 , he starred as Ethan Chandler in the horror TV series Penny Dreadful , for which he was nominated for a Fangoria Chainsaw Award .