Inside Serena Williams' '#ShakeRattleandRoll' baby shower

Eva Longoria, Kelly Rowland and La La Anthony were among the guests.

ByABC News
August 7, 2017, 11:04 AM
Serena Williams attends the "Rei Kawakubo/Comme des Garcons: Art Of The In-Between" Costume Institute Gala at Metropolitan Museum of Art, on May 1, 2017, in New York City.
Serena Williams attends the "Rei Kawakubo/Comme des Garcons: Art Of The In-Between" Costume Institute Gala at Metropolitan Museum of Art, on May 1, 2017, in New York City.
Dia Dipasupil/Getty Images For Entertainment Weekly

— -- Serena Williams went retro to celebrate her bundle of joy.

The tennis star's baby shower was held Saturday at Nick's 50's Diner in West Palm Beach, Florida, and had a 1950s theme, with the mother-to-be sporting a pompadour, poodle skirt and black-and-white saddle shoes.

Williams, 35, expecting her first child with her fiance, Reddit co-founder Alexis Ohanian, posted tons of amazing photos to Instagram and Snapchat, letting fans in on her big day.

Her celebrity friends, Eva Longoria, Ciara, Kelly Rowland and La La Anthony, also got in on the theme, according to photos posted online. Williams' big sister, Venus, was also on hand to fete "Baby O."

Williams and Ohanian, 34, announced they were expecting back in April, which was approximately four months after the two revealed on Williams' verified Reddit account that she and Ohanian were engaged.