This is the first child for the couple who secretly married in September 2017.
The musician and her partner Offset, part of hip-hop group Migos, welcomed a daughter called Kulture Kiari Cephus.
Cardi B, 25, shared a picture of herself heavily pregnant and naked, posing among flowers, and simply wrote the name of her baby and that she was born on Tuesday.
The little girl marks Cardi's first child and Offset's fourth, as he has already has two sons, Jordan and Kody, and a daughter, Kalea Marie. Before then, speculation about the news was incessant over social media, but the rapper did all the she could to downplay the rumors.
Cardi B counter 'sues' ex manager for R203 million
Cardi's legal team also claims that Raphael's companies, KSR and WorldStar, failed to give Cardi B a full accounting of her funds. Cardi B is being represented by Paul LiCalsi , an entertainment attorney who has represented major artist such as The Beatles .
Cardi B is a mommy!
In June, she told fans on Instagram she had married in secret because "there are moments that I want to keep for myself". Getting married was one of those!
I can't wait to see baby Kulture.
One morning in September we woke up and chose to get married....
She went on to talk about the engagement: 'I appreciate and love my husband so much for still wanting for me have the special moment every girl dreams of when he got down on one knee to put a ring on my finger, and he did that for me!