Leighton Meester and Adam Brody Welcome Baby Girl

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Congratulations to the proud parents!

Generation Y's favorite power couple has a baby!

Gossip Girl star Leighton Meester and The O.C. alum Adam Brody welcomed their first child, a girl, at 12:12 a.m. on Aug. 4.

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The notoriously private pair have kept the pregnancy hush-hush, never publicly commenting or confirming it, though the 27-year-old actress was spotted out and about in Los Angeles with her growing baby bump throughout her pregnancy.

Meetser and Brody, who wed in February 2014, first met when they co-starred in the 2011 film The Oranges and were teamed up again in 2014's Life Partners.

Their little one will certainly have plenty of play dates. It was revealed on Thursday that Brody's O.C. "brother," Benjamin McKenzie, is expecting a child with his rumored girlfriend, Gotham co-star, Morena Baccarin. Plus, Brody's former on-and-off-screen O.C. love, Rachel Bilson, already has a 10-month-old daughter, Briar Rose, with her fiancé, Hayden Christensen. From the Gossip Girl world, Blake Lively and her husband, Ryan Reynolds, are proud parents to 8-month-old baby girl, James.

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Can you imagine how gorgeous all these kids are going to be? A mini-Blair Waldorf or Seth Cohen? Our hearts are a-flutter. We can't wait to see this Gossip Girl-O.C. hybrid-reunion-spinoff in 15 years, but that's also because these two are so private that we may not see a photo of their kid for about that long.

If it's up to Brody, he might provide most of the casting for that dream series. In a Reddit AMA in August, the San Diego native joked about how many kids he hopes to have. "I say 12. And I decide," he said.

As for his wife, he admits that Meester pretty much runs the show, admitting, "I do some stuff but she definitely does the heavy lifting(figuratively). Literally, I do the heavy lifting."

Spoke too soon, Brody.

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Last October, Leighton revealed to Nylon that she had been looking forward to this next stage in her life. "Most people I know are starting to get married. It'll be kids next," she told the magazine. "I like the grownup stuff. I like having a house. I've got dogs."

Congratulations to the new parents!