The 36-year-old tennis pro married Reddit co-founder Alexis Ohanian in New Orleans, Louisiana, on Thursday, and a source tells Et that it was a wedding to remember.
The source called the Beauty and the Beast-themed nuptials “magical,” and said the reception was equally "beautiful.”
"The crowd was roaring," the source said. "Everyone had a blast.”
More: Serena Williams Preps for 'Beauty and the Beast'-Themed Wedding With A-List Guest List
Once Williams and Ohanian said their "I dos," that's when the bride really cut loose! According to Et's source, Williams wore a pair of Nike sneakers made "especially for her" to the reception and for good reason -- seeing as "she danced all night.”
But she wasn't dancing alone! The source noted that at one point in the evening Beyonce, Kelly Rowland, La La Anthony, Ciara, Boris Kodjoe and Nicole Ari Parker were all "dancing hard" with Williams.
The happy couple