Newly engaged Adam Brody was all smiles while leaving a boxing gym in LA on Thursday — do you think he's already getting fit for his future nuptials? The former The O.C. actor made headlines earlier this week when news broke that he popped the question to his girlfriend, Leighton Meester. Adam and the Gossip Girl star have been dating for more than a year and have managed to keep their romance pretty private. We did, however, get a glimpse of the couple looking loved-up during a stroll through NYC in September. If you're as excited as we are about the impending union of Adam and Leighton, be sure to check out our very thorough examination of how perfect their fictional characters — Seth Cohen and Blair Waldorf — really are for each other.