Watch: Serena Williams says baby No. 2 is a girl

Serena Williams announced the sex of her unborn second child with her husband, Alexis Ohanian. File Photo by John Angelillo/UPI
Serena Williams announced the sex of her unborn second child with her husband, Alexis Ohanian. File Photo by John Angelillo/UPI

Aug. 1 (UPI) -- Serena Williams has a baby girl on the way.

The former tennis pro, 41, is expecting another daughter with her husband, Reddit co-founder Alexis Ohanian.

Williams and Ohanian announced the sex of their unborn second child in a video Monday that shows the couple celebrating at their baby shower and gender reveal party with family and friends.

Ohanian played a prank on Williams where he had her cut into a cake that was plain yellow inside. The crowd then looked up to see "It's a... girl!" spelled out in a light show.

Serena Williams (R) and Alexis Ohanian attend the Costume Institute Benefit at the Metropolitan Museum of Art in May. File Photo by John Angelillo/UPI
Serena Williams (R) and Alexis Ohanian attend the Costume Institute Benefit at the Metropolitan Museum of Art in May. File Photo by John Angelillo/UPI

Williams also shared photos from the party on Instagram.

"The big REVEAL is now live on YouTube! Did you guess right?" she captioned the post.

Serena Williams plays Anett Kontaveit at the U.S. Open tennis championships in 2022. File Photo by John Angelillo/UPI
Serena Williams plays Anett Kontaveit at the U.S. Open tennis championships in 2022. File Photo by John Angelillo/UPI

Williams and Ohanian married in November 2017 and have one child, daughter Olympia, 5. The couple announced Williams' second pregnancy in May after attending the Met Gala.

"Was so excited when Anna Wintour invited the three of us to the Met Gala," Williams wrote on Instagram.

Williams had announced in August 2022 that she planned to "move on from playing" tennis, explaining that she "never wanted to have to choose between tennis and a family."