Leighton Meester and Adam Brody: Dating!

Two of this generation's most beloved teen dramas are apparently colliding... in the bedroom!

According to Us Weekly insiders, Adam Brody and Leighton Meester have been quietly dating for weeks, somehow keeping the romance a secret from fans of The OC and Gossip Girl.

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The stars appeared together in 2011's The Oranges and "were always close and friendly" on set, a source says.

Brody (forever Seth Cohen to most TV viewers) has been linked in the past to Lorene Scafaria, while Meester split with actor Aaron Himelstein a couple months ago.

The only real question remaining now: if these two get married, will the wedding take place on the Upper East Side or in Southern California?