Leighton Meester & Adam Brody Welcome Baby

Mike Coppola/Getty Images for Tony Awards Productions
Leighton Meester and Adam Brody attend the 68th Annual Tony Awards at Radio City Music Hall on June 8, 2014 in New York City. 

In news worthy of an emotional musical montage on The O.C., forever TV teens Leighton Meester -- who dropped her EP last October -- and husband Adam Brody had a baby girl, according to Us Weekly; the publication also shared that the newborn's name is Arlo Day.

The private couple never confirmed the pregnancy, but it's 2015 and TMZ has the birth certificate, so mystery solved.

Flashback Friday: 'The O.C.' Had All the Best Music

Of course, for fans of a certain age, this happy news particularly delighted the Internet, because on the very day that Meester and Brody's birth announcement was made public, it also came out that Brody's onetime O.C. brother Ryan Atwood -- err, Ben McKenzie -- was also expecting a baby (with Gotham co-star Morena Baccarin). 

Time to cue up "Hallelujah" and ponder the passage of time.