The wedding ceremony reportedly held inside the Big Easy's Contemporary Arts Center in New Orleans.
According to multiple reports, the wedding had a total of 200 strictly invited guests in attendance.
Leading the pack of celebrities in attendance is songstress, Beyonce Knowles.
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Serena had a cameo appearance in Beyonce's hit single, Sorry's video.
Other celebs spotted at the wedding are actress Nicole Ari Parker, model Selita Ebanks, Ciara, La La Anthony, Kelly Rowland, Eva Longoria and Vogue editor-in-chief , Anna Wintour.
Williams, 36, and Ohanian, 34, who became engaged last December with the tech enthusiast announcing the news on Facebook, already have a daughter together, Alexis Olympia Ohanian Jr.