TV Article Leighton Meester and Adam Brody are engaged By Andrew Asare Published on November 20, 2013 05:31PM EST Photo: Henry S. Dziekan III/WireImage Leighton Meester and Adam Brody are engaged, People reports. Meester, the former star of Gossip Girl, and Brody, the former star of The O.C., have been dating since February 2013. The two worked together on the 2011 film Oranges.