Little Louis wore a frilly cream royal christening gown which was a replica of the gown originally made for Queen Victoria's oldest daughter in 1841.
They may be Royals, but at the end of the day Prince George and Princess Charlotte are just children - as they demonstrated today. People cheered as the lovely Markle walked down the aisle accompanied by Prince Charles and 10 young page boys and bridesmaids, while Harry waited in a dark formal military dress.
Princess Charlotte has charmed her adoring fans at recent royal engagements-waving to photographers outside the hospital on the day she met her new baby brother Louis and doing somersaults in the grasswhile watching her father play polo.
Catherine's sister Pippa, who is expecting her first child, was also at the special occasion with her husband James Matthews, along with their parents Michael and Carole Middleton.
While they obviously hold the titles of Louis' aunt and uncle, the couple have missed out on being named as godparents.
The Queen was joined by the members of the royal family including Prince William, Kate Middleton, Prince Harry and Meghan Markle on the balcony of Buckingham Palace to watch the celebrations for the 100th anniversary of the Royal Air Force.
Sure, Queen Elizabeth may have appointed Prince Charles as her successor, but one question still remains: What will Kate Middleton's title be when he becomes king?
He was once mistakenly tipped to be a godfather to Prince George in 2013, saying then: "I love babies and I have calmed down quite a bit socially now".
The Duke and Duchess of Cambridge also announced their youngest son's godparents a few hours before the service.