'Twilight's' Kellan Lutz and Ashley Greene out to dinner together

kellan-lutz-ashley-greene.jpg"Twilight's" brother-sister vampires Kellan Lutz and Ashley Greene chowed down on human food together at Agura restaurant in L.A. recently.

The duo were celebrating a friend's birthday over dinner, according to People. An onlooker commented that the two were "having fun celebrating."

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