Actors Milo Ventimiglia and Hayden Panettiere was certified an item.
The famous Heroes co-stars have stopped pretending to be just friends after coming clean about the real score between them.
Actor Ventimiglia toasted the actress at the pre-Christmas Water Grill party in Los Angeles, announcing to his co-stars that he was in fact dating Panettiere .
An eyewitness said, "He called her his girlfriend and said that he loved her."
The couple spent the rest of the party sitting together and holding hands.
On some recent interviews, Milo denied being romantically linked with his co-star, "It's only natural that people are going to couple us together."
Milo Ventimiglia reported to have had an affair with a co-star back then in his Gilmore Girls days. He dated Gilmore Girls star, Alexis Bledel for three and a half years, but the relationship ended sometime July 2006.
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