Serena Williams Welcomes Baby Girl

Serena Williams welcomed a baby girl last week.

Weighing 6lbs. 13oz., it's the first child for the 35-year-old tennis pro and her fiancé, Reddit co-founder Alexis Ohanian.

The baby came just moments before older sister Venus played at the U.S. Open. 

"I'm super excited," Venus told ESPN about the new arrival. "Words can't describe."

Serena's daughter already has some friends lined up for the future: Beyoncé and Jay-Z's children Blue Ivy, Sir and Rumi Carter! Queen Bey gave her good friend a big congratulations on Instagram.