The model and reality star welcomed her first child with businessman husband Tim Leissner and both mother and baby are doing well, according to a rep.
They've named their son Wolfe Lee Leissner.
Kimora's spokesperson issued a statement to People on behalf of the new parents which said: "We are filled with joy, adoration and gratitude as we celebrate the birth of our son."
This is Kimora's fourth child.
She's also mum to daughters Aoki and Ming from her marriage to Russell Simmons, and son Kenzo from her marriage to Djimon Hounson.
Kimora told Reveal previously that her family comes first but she thinks women can have it all when it comes to children and careers.
"My kids are my priority, so family always comes first. Because we're all in the entertainment business, it just works because we're always together. It's all about the choices you make for yourself. I think there are many different paths to having it all and being happy, but you have to prioritise.
Check out some of the best maternity fashion below: