The baby girl has been named Adira River Ohanian
Ohanian posted the news on Instagram through his verified account and said: "Welcome, Adira River Ohanian."
"I'm grateful to report our house is teaming with love: a happy & healthy newborn girl and happy & healthy mama. Feeling grateful. @serenawilliams you've now given me another incomparable gift — you're the GMOAT. Thanks to all the amazing medical staff who took care of my wife & our daughter 🙏 I'll never forget the moment I introduced @olympiaohanian to her baby sister," he said.
The couple married in 2017.
They have another daughter named Alexis Olympia Ohanian Jr.