Last Friday, in the middle of the night, Beyoncé finally introduced her and JAY-Z's month-old twins, Sir and Rumi Carter, to the world with an Instagram post seen (and liked) 'round the world. Days later, details on their newborns continue to emerge. Now we know which of the Carter twins has older sibling bragging rights, according to their official birth certificates, which TMZ claims to have obtained. Though the twins were delivered on 5:13 a.m. on June 13, Rumi was delivered first and Sir followed after.

The documents also show that the newborns were delivered by Dr. Paul Crane, the same doctor who's delivered Kardashian babies, from Kim and Kourtney's kids to Rob and Blac Chyna's child, Dream.

Erica Gonzales is the Senior Culture Editor at ELLE.com, where she oversees coverage on TV, movies, music, books, and more. She was previously an editor at HarpersBAZAAR.com. There is a 75 percent chance she's listening to Lorde right now. 

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