Etiquette expert William Hanson told FEMAIL there is no strict protocol around young royals being carried by non-royals, but added that he "very much" doubted Kate's friend would have picked up Prince George in the same manner, "as a future King".
And while the new royal couldn't be more different from her sister-in-law, Kate Middleton, fans of the royal family couldn't help but compare the two women's debut solo engagements.
But it was the Kate's wedding dress everyone was talking about. Kate was pictured standing with the wedding party while holding Charlotte in her arms.
The Duchess paired the trusty Catherine Walker number with a daring custom headband by Juliette Botterill Millinery, the company behind the headpiece she wore to Prince Louis' Christening.
However her look yesterday was not entirely old.
The mother-of-three finished the look with the same blue topaz and white gold jewellery set she wore with the coat in Germany.
The Dukes of Cambridge enjoying the last months of the rest of the Royal works, so I chose to go to the wedding, Sophie Carter and Robert Snags.
A source spoke to PEOPLE on Saturday and said, "George is a real star, quite the little chap".
The cuties had no problem goofing off as George marched around in his blue pants and white shirt and Charlotte looked on happily, wearing a flower crown and a sweet white dress.
After the ceremony, cameras captured the world's most notable five-year-old playing pretend. He was also seen sneaking a quick peek outside the church before the bride arrived.