Prince William once suffered an "embarrassing" moment when attending the annual Diplomatic Corps reception at Buckingham Palace—but luckily for the Prince of Wales, Queen Elizabeth actually loved it when things went wrong at royal events. In 2016, a special documentary called Our Queen at Ninety was released by ITV in honor of Queen Elizabeth's 90th birthday. (Image credit: Getty Images)Queen Elizabeth is pictured with Prince William at the 2015 Festival of Remembrance. (Image credit: Getty Images)"My first diplomatic reception was a little bit awkward," Prince William said in the documentary. If a cake was not cutting, or a plaque didn’t unveil, because everything was so perfectly organized—it spiced her life up when things went wrong."