The Blair Waldorf & Seth Cohen Baby Has Arrived!

Major XOXO to Leighton Meester and Adam Brody, who have welcomed a baby (gossip) girl into their family, with a name we’re sure would be Eleanor Waldorf approved.

Arlo Day was born on August 4th at 12.12am, in Whittier, California.

While there’s been no comment from the couple on their happy news yet, they join the ranks of their former co-stars Blake Lively (Gossip Girl) and Rachel Bilson (The OC), as proud parents of baby girls.

Here’s hoping for an Instagram reveal any day now.