Hold the presses! Kristen Stewart actually looked happy. The infamously sulky “Twilight” star was unusually chatty Sunday at Skintimate’s Gersh Agency brunch celebrating her flick “The Runways.”

“Everyone ... was surprised to see her in such an upbeat mood,” an eyewitness told us.

Not so happy at the brunch? Justin Bartha (“The Hangover”), who showed up late to the Greenhouse Actors Lodge, was annoyed to learn he missed the buffet.

“[He] threw a fit and stormed out,” the spy dished. 

"The Runaways" stars Kristen Stewart, left, and Dakota Fanning (Getty)

NewsdayTV's Doug Geed takes us "Out East," and shows us the Long Island Aquarium, a comfort food restaurant in Baiting Hollow, a Riverhead greenhouse and Albert Einstein's connections to the East End. Credit: Newsday Staff

'It's definitely a destination' NewsdayTV's Doug Geed takes us "Out East," and shows us the Long Island Aquarium, a comfort food restaurant in Baiting Hollow, a Riverhead greenhouse and Albert Einstein's connections to the East End.

NewsdayTV's Doug Geed takes us "Out East," and shows us the Long Island Aquarium, a comfort food restaurant in Baiting Hollow, a Riverhead greenhouse and Albert Einstein's connections to the East End. Credit: Newsday Staff

'It's definitely a destination' NewsdayTV's Doug Geed takes us "Out East," and shows us the Long Island Aquarium, a comfort food restaurant in Baiting Hollow, a Riverhead greenhouse and Albert Einstein's connections to the East End.

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