Princess Elizabeth and Prince Philip met in their youth, and developed a friendship that resulted in a marriage proposal in 1946 (although not officially announced until the following year). They were married on the 20th November 1947 at Westminster Abbey. On the day, Princess Elizabeth was accompanied by her father, King George, to the abbey in the Irish State Coach (an enclosed, four-horse-drawn carriage) and the wedding was broadcast to 200 million radio listeners around the world. Since that day 70 years ago, Prince Philip has been by Queen Elizabeth's side, supporting her not only publicly but also privately.