Prince William and Kate, Duchess of Cambridge, have made it official.
The British royal couple and new parents have registered the birth of His Royal Highness Prince George Alexander Louis of Cambridge. William signed the document on Friday, according to Kensington Palace.
"The Duke and Duchess of Cambridge have formally registered the birth of Prince George," Kensington Palace announced Friday. "The Duke of Cambridge signed the birth register at Kensington Palace this morning, witnessed by a Registrar from Westminster Register Office."
William and the former Kate Middleton's occupations are filled in as Prince of the United Kingdom and Princess of the United Kingdom, respectively. William and Kate's "usual address" is listed as Kensington Palace, in London.
Prince George, who is third in line to the throne,London time, at St. Mary's Hospital, weighing in at 8 pounds, 6 ounces.