He was also caught showing his tongue for the camera, much to the surprise of his mother, Princess Diana while watching the Trooping The Colour from the balcony of Buckingham Palace, with Prince William, Lady Gabriella Windsor And Lady Rose Windsor, in June 1988.
Be sure to follow along with all our royal wedding coverage for more details of this historic day. There is no "official" rule about what women should wear at a formal wedding in the United Kingdom but there is a strongly followed unofficial rule: You want to bust out an awesome-looking hat. That became very clear during the wedding of Prince Harry and Meghan Markle when she was caught sticking her tongue out at the crowds as she rode in a auto to Windsor Castle.
While holding Kate's hand, Princess Charlotte gave the crowds an adorable wave, just like the time she went to meet her younger brother Prince Louis in St Mary's hospital for the first time. Both are also wearing Blues and Royals frockcoats for the Wedding Day.More news: West Ham close to hiring manager with 'proven record'
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After the Royal Wedding, those who watched the ceremony spoke of how well behaved the young children were. The royal, now aged 33, famously made a silly face out of another auto window after a visit to the hospital to see his newly-born cousin, Princess Beatrice, in 1988.
The bright, emerald-cut ring was unmissable as Meghan waved to well-wishers while she and Harry departed for their private second reception, which included 200 of the couple's closest friends and family.
However, according to the Mirror, the children were so mischievous during the rehearsals for the wedding that Kate and the other children's mums were asked to accompany the children into the chapel. Unsurprisingly, it has reminded many people of an equally cute moment that happened at Harry and Meghan Markle's wedding on May 19.