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For first publication 22.30 hours BST on Sunday July 15th 2018:
OFFICIAL PORTRAIT OF THE CHRISTENING OF PRINCE LOUIS. OBLIGATORY CREDIT LINE: PHOTO MATT HOLYOAK/CAMERA PRESS.         
Official portrait taken in the Morning Room at Clarence House, following the christening of Prince Louis at St James?s Chapel.
Seated (left to right): The Duke of Cambridge, Prince George, Prince Louis, The Duchess of Cambridge, Princess Charlotte.
Standing (left to right): The Duchess of Cornwall, The Prince of Wales, The Duke of Sussex, The Duchess of Sussex.
THIS PHOTOGRAPH IS PROVIDED FOR FREE NEWS USAGE IN CONNECTION WITH PRINCE LOUIS?S CHRISTENING UNTIL JULY 29TH 2018 . AFTER WHICH IT MUST BE REMOVED FROM ALL YOUR SYSTEMS. USAGE RIGHTS ARE STRICTLY EDITORIAL NEWS ONLY, NO COMMERCIAL, SOUVENIR OR PROMOTIONAL USE PERMITTED. MAGAZINE COVER USAGES REQUIRE APPROVAL. THE PHOTOGRAPH CANNOT BE CROPPED, MANIPULATED OR ALTERED IN ANY WAY.
Matt Holyoak/CAMERA PRESS
For first publication 22.30 hours BST on Sunday July 15th 2018: OFFICIAL PORTRAIT OF THE CHRISTENING OF PRINCE LOUIS. OBLIGATORY CREDIT LINE: PHOTO MATT HOLYOAK/CAMERA PRESS. Official portrait taken in the Morning Room at Clarence House, following the christening of Prince Louis at St James?s Chapel. Seated (left to right): The Duke of Cambridge, Prince George, Prince Louis, The Duchess of Cambridge, Princess Charlotte. Standing (left to right): The Duchess of Cornwall, The Prince of Wales, The Duke of Sussex, The Duchess of Sussex. THIS PHOTOGRAPH IS PROVIDED FOR FREE NEWS USAGE IN CONNECTION WITH PRINCE LOUIS?S CHRISTENING UNTIL JULY 29TH 2018 . AFTER WHICH IT MUST BE REMOVED FROM ALL YOUR SYSTEMS. USAGE RIGHTS ARE STRICTLY EDITORIAL NEWS ONLY, NO COMMERCIAL, SOUVENIR OR PROMOTIONAL USE PERMITTED. MAGAZINE COVER USAGES REQUIRE APPROVAL. THE PHOTOGRAPH CANNOT BE CROPPED, MANIPULATED OR ALTERED IN ANY WAY.
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Kate, Duchess of Cambridge carries Prince Louis as they arrive for his christening service at the Chapel Royal, St James's Palace, London, Monday, July 9, 2018. (Dominic Lipinski/Pool Photo via AP)
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Tim Ireland/AP
Britain's Prince William and Kate, Duchess of Cambridge wave as they hold their newborn baby son as they leave the Lindo wing at St Mary's Hospital in London London, Monday, April 23, 2018. The Duchess of Cambridge gave birth Monday to a healthy baby boy — a third child for Kate and Prince William and fifth in line to the British throne. (AP Photo/Tim Ireland)
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Catherine, Duchess of Cambridge, carries Princess Charlotte of Cambridge as they arrive at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte of Cambridge on Sunday, July 5.
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BARROW-IN-FURNESS, UNITED KINGDOM - APRIL 05:  Prince William, Earl of Strahearn and Catherine, Countess of Strathearn are greeted by Rear-Admiral Simon Robert Lister and Commander Steve Garrett as they visit the Astute-class Submarine Building at BAE Systems on April 5, 2013 in Barrow-in-Furness, United Kingdom. The Duke of Cambridge is Commodore-in-Chief of the Royal Navy Submarine Service and during their visit they will tour the offices of Vanguard replacement programme and meet with the crew of Artful and their families, who are now based in Barrow.  (Photo by Chris Jackson-Pool/Getty Images)
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BARROW-IN-FURNESS, UNITED KINGDOM - APRIL 05: Prince William, Earl of Strahearn and Catherine, Countess of Strathearn are greeted by Rear-Admiral Simon Robert Lister and Commander Steve Garrett as they visit the Astute-class Submarine Building at BAE Systems on April 5, 2013 in Barrow-in-Furness, United Kingdom. The Duke of Cambridge is Commodore-in-Chief of the Royal Navy Submarine Service and during their visit they will tour the offices of Vanguard replacement programme and meet with the crew of Artful and their families, who are now based in Barrow. (Photo by Chris Jackson-Pool/Getty Images)
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This photo taken Wednesday, July 2, and released Monday, July 21, to mark Prince George's first birthday, shows Britain's Prince William and Kate Duchess of Cambridge and the Prince during a visit to the Sensational Butterflies exhibition at the Natural History Museum, London.
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Prince William and Catherine, Duchess of Cambridge's new-born baby boy is introduced to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.   AFP PHOTO / CARL COURT CARL COURT/AFP/Getty Images
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Story highlights

Certificate gives full name as Her Royal Highness Princess Charlotte Elizabeth Diana of Cambridge

CNN —  

The birth of the UK’s newest royal is now a matter of official government record.

Three days after Charlotte Elizabeth Diana was born, her birth certificate was filed Tuesday by her father, Prince William, the Duke of Cambridge.

The certificate was shown to the world via a tweet from Kensington Palace, the official residence of William and his wife, Catherine.

Charlotte’s full name is given as Her Royal Highness Princess Charlotte Elizabeth Diana of Cambridge.

William listed his occupation as few others can, entering simply, “Prince of the United Kingdom.”

He does have a civilian job – as an air ambulance pilot, following his years in the Royal Air Force – but he’s better known as second in line to the throne, behind his father, Prince Charles.

Charlotte was born Saturday at London’s St. Mary’s Hospital.

Her name was announced Monday. Charlotte, a feminine form of Charles, is likely a nod to her grandfather.

The middle names acknowledge her great-grandmother, the current queen, and her paternal grandmother, Princess Diana, who died in 1997.

Charlotte is fourth in line to the throne, with her brother, Prince George, ahead of her.

CNN’s Max Foster contributed to this report