Everyone's favorite Hero comes of age today. Hayden Panettiere celebrate's her 18th birthday, officially moving her from jailbait to legal tender. These pictures of Hayden are from last night's appearance on the Late Show. The Heroes season premiere isn't for another month (Sept 24th), so put away your equipment for now If you need a reminder how Hayden looks in a bikini (at 17), there you go.

Photo: Wenn