Embargoed until July 21, 2018 - 21:30 GMT / A handout picture released by Kensington Palace to mark Prince George's fifth birthday shows Prince George smiling to camera following his brother Prince Louis christening on July 9, 2018 at Clarence House in London. / AFP PHOTO / DUKE AND DUCHESS OF CAMBRIDGE / Matt Porteous / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / DUKE AND DUCHESS OF CAMBRIDGE / MATT PORTEOUS " - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO USE AFTER DECEMBER 31, 2018 /

A picture released by Kensington Palace on May 19, 2019 shows Britain's Prince William, Duke of Cambridge and Britain's Catherine, Duchess of Cambridge with their children Prince George (L), Princess Charlotte (C) and Prince Louis at the Adam White and Andree Davies co-designed 'Back to Nature' garden ahead of the RHS Chelsea Flower Show in London. (Photo by Matt Porteous / KENSINGTON PALACE / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / KENSINGTON PALACE / MATT PORTEOUS" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO USE AFTER DECEMBER 31, 2019 - TO BE USED IN RELATION TO THE EVENTS MENTIONED IN CAPTION /

A handout picture released by the Duke and Duchess of Cambridge on May 1, 2020 to celebrate the fifth birthday of Princess Charlotte shows Princess Charlotte helping to pack up and deliver food packages for isolated pensioners in Kings Lynn in April. (Photo by The Duchess of Cambridge / DUKE AND DUCHESS OF CAMBRIDGE / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / DUKE AND DUCHESS OF CAMBRIDGE " - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS, NOT FOR USE AFTER 31 DECEMBER, 2020, WITHOUT PRIOR PERMISSION FROM KENSINGTON PALACE /

Britain's Catherine, Duchess of Cambridge (C), holds the hand of her son, Britain's Prince Louis of Cambridge (L) and her daughter Britain's Princess Charlotte of Cambridge (R) as they attend a special pantomime performance of The National Lottery's Pantoland at London's Palladium Theatre in London on December 11, 2020, to thank key workers and their families for their efforts throughout the pandemic. (Photo by Aaron Chown / POOL / AFP)

Prince George of Cambridge leaves his sister Charlotte's christening at St. Mary Magdalene Church in Sandringham, England, on July 5, 2015. Britain's baby Princess Charlotte was christened on Sunday in her second public outing since her birth nine weeks ago to proud parents Prince William and his wife Kate. The low-key ceremony took place in a church on the country estate of great grandmother Queen Elizabeth II. AFP PHOTO / POOL / CHRIS JACKSON