Serena Williams celebrates upcoming wedding with lavish Midtown bash

New mom Serena Williams celebrated her upcoming nuptials to tech mogul fiancé Alexis Ohanian with a bachelorette party in Midtown.

Sister Venus Williams, La La Anthony, Ciara and others joined the tennis champ for a weekend of cake-making, a trapeze class, Jell-O shots, afternoon tea and a special dinner at the Baccarat, we hear.

The luxe hotel closed its pool in order for the group to enjoy a private bash and facials at Spa de la Mer.