Leighton Meester and Adam Brody have had their baby.

Seth and Blair have had a baby, you guys.

Actress Leighton Meester and her husband Adam Brody welcomed their first baby into the world – more than a month ago.

The yet-to-be-confirmed birth follows a yet-to-be-confirmed pregnancy from the couple.

But gossip sites like TMZ don’t need confirmation when they have their own sleuths uncovering birth certificates. The site revealing that Meester gave birth to a baby girl on August 4th.

TMZ has revealed that the couple have named their daughter Arlo Day.

The former Gossip Girl and O.C. stars never confirmed this very secret baby instead her growing bump  gave the game away.

The two like their secretes, they even got married in a secret ceremony in February 2014.

Meester and Brody have kept their relationship very private, though the 29-year-old actress told Nylon magazine last year, “Most people I know are starting to get married. It’ll be kids next. I like the grown-up stuff. I like having a house. I’ve got dogs.”

“I started [Gossip Girl] when I was so young,” she added. “And once it was over, I wanted to do things that were exciting and challenging and more me—more my adult taste.”

Congratulations to the new family.