The United Kingdom's Queen Elizabeth II celebrated her 70th wedding on Monday with her Prince Philip, Duke of Edinburgh. The Queen walked down the as a 21-year-old princess on November 20, 1947. She is the first British monarch to celebrate a platinum wedding anniversary. She is also the UK's longest-ever monarch. The couple celebrated their special day with family and friends at a small private party at one of their homes - Windsor Castle, west of London. They marked the with the release of a set of portraits. Britain's post office has also celebrated the historic landmark with a special set of commemorative postage .
The royal first met as teenagers during World War II. Prince Philip was the son of a Greek . He gave up his title to become a British to marry the then Princess Elizabeth. Reports say that to the wedding, he told his future mother-in-law that he had, "fallen in completely and unreservedly" with her daughter. He once stated that: "My job first, second and last, is to let the Queen down." The Queen has always relied on her husband, whom she described as her "". Jennie Bond, a former BBC royal correspondent, explained that humor helped their . She said: "A big part of what has kept them going over so years is the fact they can share a together."