The service will be conducted by the Archbishop of Canterbury, the Most Reverend Justin Welby, who also baptized Meghan and officiated her nuptials to rince-ha.
Following in the tradition of all the other royal children - including his older brother Prince George and Princess Charlotte - Prince Louis will be welcomed into the Church of England at the ceremony, presided over by the Archbishop of Canterbury at the Chapel Royal at St. James's Palace in London.
This will be the first time that the public get to see the new Prince in real time since his birth.
It's set to take place on Monday, July 9, according to a statement from the Duke and Duchess of Cambridge released via the palace. "Obviously events such as Meghan and Harry's wedding and Trooping the Colour were exceptions and Louis is expected to be christened in the summer".
His big sister, Princess Charlotte was christened at St Mary Magdalene church on the Queen's estate in July 2015, two months after she was born. Prince George's christening back in 2013 only had 22 guests, with only senior royals, four members of the Middleton family, the seven godparents and their spouses among the guests.
As of Wednesday, we know what's next up on the royal schedule that'll draw the family together once again: Prince Louis's christening. The Duke and Duchess of Cambridge will share photos but will keep the occasion as private as possible. He also officiated the christenings of Louis' siblings, Prince George, 4, and Princess Charlotte, 3.