Gossip Girl and The O.C. fans, this is the day you've been waiting for. Blair Waldorf and Seth Cohen—err, Leighton Meester and Adam Brody—have welcomed their first child together, People confirms. Meester gave birth to a girl on August 4, and her name couldn't be more adorable—Arlo Day Brody.
The couple secretly married in February of 2014 and although they never publicly acknowledged that they were expecting, Meester stepped out in May of this year with a very noticeable baby bump. And just like the rest of their relationship and family life, the private couple has managed to keep news of their new bundle of joy fairly under wraps. Here's to hoping we get to learn more about the littel boy or girl very soon, and congrats to the growing family!