United Kingdom's Queen Elizabeth II celebrated her 70th wedding anniversary on Monday with her husband Prince Philip, Duke of Edinburgh. The Queen walked down aisle as 21-year-old princess on November 20, 1947. She is first British monarch ever to celebrate platinum wedding anniversary. She is also UK's longest-ever reigning monarch. couple celebrated their special day with close family and friends at small private party at one of their royal homes - Windsor Castle, west of London. They marked occasion with release of set of official portraits. Britain's post office has also celebrated historic landmark with special set of commemorative postage stamps.
royal couple first met as teenagers during World War II. Prince Philip was son of Greek prince. He gave up his title to become British citizen to marry then Princess Elizabeth. Reports say that prior to the wedding, he told his future mother-in-law that he had, "fallen in love completely and unreservedly" with her daughter. He once stated that: "My job first, second and last, is never to let Queen down." The Queen has always relied on her husband, whom she described as her "rock". Jennie Bond, former BBC royal correspondent, explained that humor helped their longevity. She said: "A big part of what has kept them going over so many years is fact they can share joke together."