Awkward! Working Together After the Breakup

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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. 

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