Tennis superstar Serena Williams is on her mommy duties. The sports icon has welcomed her first child with fiancé and Reddit co-founder Alexis Ohanian.

According to reports, Williams officially turned into a mom Friday (September 1).

The tennis pro welcomed a baby girl on Friday — in the middle of the U.S. Open — at St. Mary’s Medical Center in West Palm Beach with fiancé Alexis Ohanian. “Tennis star Serena Williams gives birth to a baby girl weighing 6 pounds, 13 ounces. Mom and baby doing well,” WPBF-25 news producer Chris Shepherd announced on Twitter, citing a source at the hospital. (New York Daily News)

Serena’s sister Venus made sure to weigh-in on the baby news.

“Obviously I’m super excited. Words can’t describe,” sister Venus told ESPN moments before stepping on to the court for her U.S. Open match in Queens, New York Friday afternoon. (People)

R&B superstar Beyoncé hit up Instagram Friday to acknowledge the birth.

A post shared by Beyoncé (@beyonce) on