Congrats to Serena Williams and fiance Alexis Ohanian on the birth of their first child.

The tennis champ welcomed a baby girl at at St. Mary’s Medical Center in West Palm Beach, FL, a source confirmed to Us Weekly on Friday.

It’s the first child for both Williams and  Ohanian who is the co-founder of the social bulletin board site, Reddit.

The couple got engaged last December and Williams revealed her pregnancy via Snapchat, on accident, in April

Congrats to Serena and Alexis on their growing family!