Some royal family watchers have speculated that he is likely to be christened in July, with his brother, Prince George, christened three months after his July 2013 birth.
The little prince, the younger brother of Prince George and Princess Charlotte, will be baptized in the Chapel Royal at St James's Palace.
Kate has been taking an extended maternity leave compared to her the time taken for Prince George and Princess Charlotte.
"Prince Louis will be christened by The Archbishop of Canterbury, the Most Reverend Justin Welby", the Palace said.
Kate Middleton, 36, gave birth to Prince Louis just under two months ago, and since then has been officially on maternity leave.
Princess Charlotte is being christened in the church if St Mary Magdalene in Sandringham, Norfolk, where Princess Diana was also christened.
After giving birth to Prince Louis on the 23rd April, Kate's first official public appearance was the wedding of the new Duke and Duchess of Sussex. "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".
William and Kate shared the first photos of Prince Louis in May, along with sweet images of him with big sister Princess Charlotte. His siblings were each baptized in the same gown design that a whopping 62 of their ancestors also wore, according to Romper.
However in 2008 a new replica was made as the original, worn by the Prince of Wales, the Duke of Cambridge and Prince Harry among others, had to be carefully preserved after becoming worn down.