The 40-minute ceremony will be conducted by the Archbishop of Canterbury, the Most Reverend Justin Welby, who was also involved in the wedding of Prince Harry and Meghan Markle in May.
There were also several more royal traditions adhered to at the royal christening.
It wasn't just Louis that stole the show on the day of his christening.
The Duchess of Sussex has arrived at Prince Louis' christening opting for an atypical outfit choice.More news: Trump Administration Will Not Meet Deadline for Reuniting Young Children
Meghan and Harry have not been appointed as Prince Louis godparents, despite public speculations that the couple would be chosen by the Duke and Duchess of Cambridge.
However, his great-grandmother the queen and her husband Prince Philip will not be among the guests, Kensington Palace said.
Lady Laura Meade will Godmother to Prince Louis.
The christening took place at the Chapel Royal at St. James's Palace in London.More news: Former Ohio State wrestling coaches release statement supporting Jordan
Louis' brother, Prince George was baptised at the very same church at St James Palace, the Chapel Royal in 2003 while Princess Charlotte was christened at the Church of St Mary Magdalene in 2015, the same church as Princess Diana. Kate's parents Carole and Michael Middleton, her brother James and her pregnant sister Pippa were also present.
Prince Louis was carried into the chapel by his beaming mother, wearing the handmade replica of the Royal Christening Robe, which in 2008 replaced the original which had been worn for all royal christenings since that of Queen Victoria's eldest daughter in 1841. According to the Press Association, "The decision was not made on health grounds, Buckingham Palace says, and it is understood to have been mutually agreed by the Queen and the Cambridges some time ago".
Prince William and the former Kate Middleton were joined at the christening by both of their families.More news: Billy Dee Williams Returning as Lando Calrissian in Star Wars: Episode IX