Grease themed baby shower

Serena Williams' 1950s baby shower

The 36-year-old and her celebrity friends threw a massive party on Saturday to celebrate her impending baby, and the theme was 1950s.

However, Serena and her squad, including the likes of Ciara, Eva Longoria, La La Anthony and Kelly Rowland, ended up looking like extras from the Grease movie as they partied at Nick's Diner in Florida.

Dressed in '50s garb, wearing black-and-white saddle shoes and a yellow poodle skirt, Serena was the toast of the party. Her sister, Venus was also there and in costume as well.