Milo Ventimiglia & Hayden Panettiere
By ANTOINETTE BUENO
May 09, 2013
The Heroes co-stars struck up a May-December romance in 2007 (there's a 12-year age difference between the two), but split by 2009. "It was a lifestyle conflict. They were in very different places," a source close to the couple told Us Weekly of their breakup.