Leighton Meester and Adam Brody are reportedly engaged

Nov. 20 (UPI) -- It's the Gossip Girl-O.C. crossover episode you never thought you'd get to see. Leighton Meester, 27, who played wealthy, headband-loving Blair Waldorf on the CW's Gossip Girl is reportedly engaged to Adam Brody, 33, who played TV's most attractive "nerd" on The O.C.

Though both shows were created by Josh Shwartz, Brody and Meester didn't really get to know each other until they starred in 2011's The Oranges.

They've been "secretly dating" since early this year -- and have attended a few events together -- but have yet to publicly confirm their relationship.

[Wonderwall, Us Weekly]