The Duke and Duchess of Cambridge have formally registered the birth of their daughter, Princess Charlotte Elizabeth Diana, who was born on Saturday in the Lindo Wing of London’s St. Mary’s Hospital. The baby weighed at 8 pounds, 3 ounces at birth.

According to an update from Kensington Palace's official Twitter page, the 32-year-old Prince William signed the birth register for his second child, who will be known as Her Royal Highness Princess Charlotte of Cambridge, on Tuesday. A registrar from Westminster Register Office witnessed the regal event.

The Daily Mail reported that Queen Elizabeth II, Prince Charles, Prince William, Prince Harry and Princess Charlotte's big brother Prince George, who was born July 22, 2013, all had their births registered by Westminster City Council. Charlotte, who is fourth in line to the throne, is now the most recent member of the royal family to follow suit.

The certificate states the date and place of Charlotte’s birth in addition to information about her parents. The birth registrar confirms the birthplace of both Prince William and Kate Middleton, the occupations of Charlotte’s parents and the family’s “usual address,” which is listed as Kensington Palace.

The baby's father certified the registrar by signing his first name, William.