This will be the first time that the public get to see the new Prince in real time since his birth.
"Prince Louis will be christened by The Archbishop of Canterbury, the Most Reverend Justin Welby", the Palace said.
It is modelled after the wedding dress Queen Victoria wore for her marriage to Prince Albert in 1840, a year before the birth of their first child.
George's christening at the same venue in October 2013 was an intimate occasion, with only 23 guests attending.
The christening of Prince Louis will take place on July 9.
The good news for his football-loving dad, Prince William, is that 9 July is one of the rest days in the World Cup.
Former Trump campaign chairman Manafort sent to jail
Last week, Mueller charged him in a new indictment with witness tampering, which Manafort pleaded not guilty to on Friday. I feel a little badly about it. "I don't think it's right", Trump said of investigators reaching back more than a decade.
Prince William and Kate, the Duke and Duchess of Cambridge, have named their third child.
According to Fitzwilliams, Prince Harry and Markle's attendance in the event is already a representation for the royal family.
George, four, was also christened at the Chapel Royal, while three-year-old Charlotte was baptised two months after her birth at the Church of St Mary Magdalene in Sandringham.
Prince William and Middleton will reportedly make a compromise for their son's christening.