If David Arquette has not lost it already, this news may send him over the edge.
Sources tell E! News that Courteney Cox and Cougar Town co-star Brian Van Holt acted quite cozy at that show's holiday party this week.
"Courteney and Brian pretty much stuck together the majority of the evening," a witness said. "There wasn't any hand-holding or kissing. But they did stay and stand together for most of the party."
On their ABC sitcom, Cox portrays Jules and Van Holt play her ex-husband, Bobby. Rumors of a personal relationship between the pair started in May.