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Rihanna and A$AP Rocky 's baby girl Rocki was born just after midnight on Sept. 13 in L.A., TMZ can confirm.

We got our hands on the new birth certificate, and it shows the parents of three welcomed their little one at Cedars-Sinai Medical Center. Document Launch Doc

TMZ broke the exciting news Wednesday afternoon that the happy couple had welcomed their third child ... shortly after which they posted on social media their new bundle of joy's name is Rocki.

She joined her older brothers, Rza , 3, and Riot , 23 months. Gallery Launch Gallery DIGGZY/Shutterstock

As you know, RiRi first revealed her third pregnancy by showing off her growing baby bump at the Met Gala in May.

The "Don't Be Dumb" artist revealed he and Rihanna were "prayin

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