On Tuesday, Prince William registered the birth of his newborn daughter, HRH Princess Charlotte Elizabeth Diana. William signed the registry at Kensington Palace overseen by a registrar from Westminster Register Office.
Royal fans were quick to note that under the 'occupation' heading for Kate, William wrote: "Princess of the United Kingdom," while their address was signed as Kensington Palace.
The Duke filed the official document on the same day Princess Charlotte was met by her great-grandmother the Queen for the first time. William and the Duchess of Cambridge, née Kate Middleton, introduced their newborn baby to Her Majesty in their apartment at Kensington Palace.
Princess Charlotte is the first girl to have been born to a direct heir to the throne since the Queen gave birth to Princess Anne 64 years ago, and is the monarch's fifth great-grandchild.
The 89-year-old was previously expected to meet with the three-day-old before her name was announced on Monday. She will surely have been honoured that William and Kate have chosen to name their first daughter Charlotte Elizabeth Diana in recognition of her.
Other members of the royal family to have already met the new Princess include an "absolutely delighted" visited the family at Kensington Palace along with their daughter Pippa on Sunday.
Meanwhile Prince Harry has reportedly said that he "can't wait" to meet his "absolutely beautiful" niece when he returns from Australia.
The nation had been eagerly waiting to hear what William and Kate would name their baby girl after her arrival at 8.34am on 2 May. "Her Royal Highness The Duchess of Cambridge was safely delivered of a daughter at 8.34am," Kensington Palace announced on Twitter. "The baby weighs 8lbs 3oz. The Duke of Cambridge was present for the birth.
"The Queen, The Duke of Edinburgh, The Prince of Wales & The Duchess of Cornwall, Prince Harry & members of both families have been informed. Her Royal Highness and her child are both doing well."