Nate Archibald and Chuck Bass play best friends on Gossip Girl.

It's only fitting, then, that co-stars, roommates and pals Chace Crawford and Ed Westwick are totally thisclose in real life as well!

The twosome showed up at a recent show by British pop stars The Ting Tings in New York, and the Daily News reports that they're inseparable.

"They were never more than a foot apart. It was freaky. If one moved two feet to the left, so did the other," said a fellow concert-goer.

The duo also chose to ignore the hordes of flirty girls trying to get their attention, says the spy: "They were only interested in each other."

Aww. Best buds. So cute!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.