Best Known For: Black Hawk Down (2001), O (2001)
Most Recent Project: Stuck Between Stations (2011)

At one point, it looked like Superman was in Josh Hartnett's future. After his success in films like Black Hawk Down and O, everybody wanted a piece of the chiseled hunk. He was courted to star in a reboot involving the Man of Steel and appeared on every conceivable "hottest guy list." He was even named "Hottest Vegetarian Alive," in 2003. Then, the Hartnett heat cooled.

Occasionally taking a role, Hartnett's more about activism these days. He's involved in a campaign to raise awareness regarding East African drought and was a large part of Barack Obama's re-election campaign in Minnesota.