Bradley Cooper and Olivia Wilde

Olivia Wilde and Bradley Cooper together?!  Well, yes.  They’ve been out on two dates in the past week.  That’s a good sign.  And then there are these photos from the Hangover Part II premiere after party at the Boom Boom Room in NYC.

PHOTOS: Crystal The Monkey Steals The Show at The Hangover: Part II Premiere in Los Angeles

“Olivia was Bradley’s date,” an eyewitness tells Life & Style. “He was always taking her hand or putting his hand on her lower back, it was really sweet. He took care of her all night.  They were definitely together.  At one point, they even wanted some alone time and hiked up the stairs to the roof, but they had trouble getting there!  They left together at 12:15,” the eyewitness says. “They seemed really comfortable together.”

So how serious is it?  Are they just bed buddies?  Or is this going to really heat up?  I guess this means that Olivia and Justin Timberlake aren’t together!