gossip girl hide the oc leighton meester adam brody

Why so shy, Blair Waldorf?

Adam Brody and new girlfriend Leighton Meester were out and about in L.A. last night, and the hot couple apparently wants to keep their budding relationship private, because when we caught up with them, the OC actor was driving while his lady love hid in the backseat. If you look closely, you can see a tiny part of the Gossip Girl actress' houndstooth coat.

So how did these two get together?

They were co-stars in the dark comedy The Oranges and immediately hit it off. "They were always close and friendly," a source told Us.

Just the other day, the Country Strong star was spotted leaving her beau's house in Los Feliz, so things are definitely heating up with these lovebirds!