Whoever thought the icy Blair Waldorf would meet her match in sensitive O.C. stud Seth Cohen?!
The notoriously private couple have been dating for less than a year and were first romantically linked in early February.
While the lovebirds have yet to publically confirm their romance, the twosome were most recently seen holding hands in NYC and have been photographed together a handful of times while out and about in Los Angeles.
Brody and Meester both worked together on the 2011 film The Oranges before they began spending time together romantically in 2013.
Prior to Adam, Leighton dated actor Aaron Himelstein, whom she met on the set of Remember the Daze, and before Aaron, she was romantically linked to her former Gossip Girl costar Sebastian Stan. Brody, meanwhile, was said to be seeing director and screenwriter Lorene Scafaria back in 2010, and, during the height of The O.C.'s popularity, he dated costar Rachel Bilson from 2003 to 2006.
And while Meester always plays coy when it comes to talking about the men in her life, she opened up about falling in love to Cosmopolitan magazine back in 2012.
"I haven't been in a lot of relationships, but I've been in love," she said. "There's an inexplicable chemistry. You just really, really want to, like, stare at the person. I've never fallen in love right off the bat. I get scared to say I love you too soon because it means so much. It means you're not seeing an end to things."
Wonderwall was first to break the couple's engagement news.
Congrats, you two!