The family event is sure to make for some memorable moments, especially with his older siblings Prince George and Princess Charlotte, who regularly steal the show with their cuteness.
Louis will be baptized at The Chapel Royal, St James's Palace, London.
The news was confirmed on Wednesday by Kensington Palace on Twitter, adding the christening will take place at The Chapel Royal in St James's Palace in London. The date coincidently falls a week after Prince George finishes his school year and Princess Charlotte breaks for the summer.
Princess Charlotte's (pictured) Christening took place at St. Mary Magdalene Church, Sandringham.
Prince Louis will be seen for the first time since his Lindo Wing photo op next month, when he's christened by The Archbishop of Canterbury and the Most Reverend Justin Welby on July 9.
Princess Charlotte was christened on 5 July 2015 at St Mary Magdalene Church in Sandringham.
"Judging by the previous christenings, and the importance of the day for the family, Louis' christening will be a private affair, perhaps no surprise there".
The baby prince, who will be 11 weeks old at the time of the christening, will be welcomed into the Christian faith dressed in the same frilly, cream gown used for George and Charlotte.
The tradition of wearing the gown started in 1841 when the original gown was made for Queen Victoria's first child Princess Victoria's baptism.
Christenings are a must for royal babies.