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Robert Pattinson, Kristen Stewart

MTV

Robert Pattinson and Kristen Stewart are getting back into the swing of things…together.

Before Robsten hits the red carpet together at the Breaking Dawn—Part 2 world premiere Nov. 12, the Twilight stars were spotted celebrating a friend's birthday at the Beatrice Inn in New York City Thursday night with the likes of John Mayer, Sienna Miller, Tom Sturridge, Leonardo DiCaprio and Nicky Hilton.

"Rob and Kristen are definitely a couple," a source who saw the duo at the affair told E! News. 

According to the New York Daily News, Pattinson and Stewart arrived separately to the event, but later headed to nightclub The Electric Room together after finishing dinner at about 1 a.m.