Actor Bradley Cooper romancing with Olivia Wilde

Updated: May 26, 2011, 09:21 AM IST

London: Actor Bradley Cooper is dating `Tron: Legacy` actress Olivia Wilde.

Cooper and Wilde, were seen together at the afterparty of the actor`s new movie "The Hangover Part II" in New York`s Boom Boom Room.

"Olivia was Bradley`s date. 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," quoted a source as saying.

"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. They seemed really comfortable together," the source added.