Serena Williams has a baby girl on the way.
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.
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.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.