After all, when Kate grew up, she wasn't a member of the British Royal Family like Charlotte, which likely accounts for the differences in hairstyle and poise.
He was baptized at the Chapel Royal on the grounds of St James's Palace in London, just like his older brother George.
This isn't the first time Prince George's little sister has worn the brand - Pepa & Co are same company that made the together page boy and flower girl outfits for aunty Pippa Middleton's wedding to James Mathews in 2017.
His eldest sibling Prince George, 4, clutched his dad Prince William's hand and had his trademark look of vague distaste on his face (god I love this kid) while sister Princess Charlotte, 3, looked mostly confused.
Prince Louis was born on April 23, 2018, and on July 9, he was christened for the world to see. Like his siblings Prince George and Princess Charlotte before him, Louis will be dressed up in an article of clothing that carries the weight of history. The new version was made by the Queen's dresser, Angela Kelly.
They include Guy Pelly, once dubbed the "court jester" to William and Harry for his wild ways that were often cited as a bad influence on the brothers in their youth, running their favorite drinking haunts.
Following the 40-minute traditional religious service, guests attended a private tea which included slices of christening cake, from a tier taken from the duke and duchess' wedding cake.
Prince Louis' christening was the fourth time the cake was eaten, on separate occasions first at their wedding, then again at each one of their three children's christenings. Interestingly, Robert is the brother of Sophie Carter, another close friend and confidant of Kate Middleton.