Williams and Ohanian have already proven to be the most adorable family with their 11-week-old Alexis Olympia Ohanian Jr.
Th couple met in 2015, and Ohanian, 34, co-founder of social news site Reddit, proposed to Serena, 36, in a surprise trip to Rome in December 2016. The reports said that "Serena and Alexis have spared no expense on their dream wedding". The Daily Mail first reported details of the upcoming wedding.
The outlet reports that the nuptials are so shrouded in secrecy that the guests haven't even been told of the wedding location.
Among the guests could be Prince Harry's girlfriend, Meghan Markle.
The couple is said to Wednesday on Thursday in a lavish ceremony costing upward of $1 million, according to the Daily Mail.
All guests wore white, with LaLa Anthony, Ciara, and the Williams sisters posing for a photo shared exclusively with PEOPLE.
The source says: 'They have hired the best of the best and can't wait to get married in The Big Easy.
Recently, Serena revealed that she's upset with Alexis, Sr., though, and the reason is actually really sweet.
In other news, Serena Williams recently complained that her fiancé spends a little bit too much money on toys for their baby.
'Alexis will have a babysitter on hand just for her the entire night, ' the source says. They are totally and utterly besotted with her'.