The tennis icon gave birth in West Palm Beach, Fla., according to reports.
Tennis icon Serena Williams has given birth to a 6-pound, 13-ounce baby girl Friday, according to reports.
It's the first child for the 35-year-old and her fiancé, Reddit co-founder Alexis Ohanian.
Read: Ex-'Bad Boy of Tennis' John McEnroe Gets Served Over Serena Williams Remarks
Williams, who was pregnant during the Australian Open earlier this year, announced the news on Snapchat in April with a photo of her stomach and the caption: “20 weeks.”
Moments before her sister, Venus, played in the U.S. Open Friday in Queens, N.Y., she was asked by ESPN about the news and expressed immense joy.
"Obviously, I'm super excited. Words can't describe,” she said.
Read: Pregnant Serena Williams Hits the Tennis Court as She Longs to Be at Wimbledon
ESPN reports that Serena Williams had the baby in West Palm Beach, Fla.
She put her tennis career on hold for the remainder of the year so she can focus on being a mom. However, her coach, Patrick Mouratoglou, said he plans to get her training again by November.
Watch: Oops! Serena Williams Admits She Made Pregnancy Announcement by Mistake