Prince Charles and Princess Diana kiss on the balcony after their wedding in 1981.
Queen Elizabeth's eldest son Prince Charles and his new bride Princess Diana made history on the balcony of Buckingham Palace in 1981, and the trend was followed by his brother Prince Andrew and son Prince William.
The heir to the throne, Prince Charles and Princess Diana, kiss on the balcony after their wedding in 1981.
Andrew did the same thing when he married Sarah Ferguson in 1986, as did Charles and Diana's eldest son, Prince William, after marrying Kate Middleton.
Meanwhile, Queen Elizabeth, who has cut back on her public appearances since last October and has difficulty standing and walking, is expected to appear on the balcony on Thursday to mark her platinum jubilee.
From there, he would watch a ceremonial fly-past of military aircraft, which traditionally ends his official birthday celebrations.
She could also make a second appearance on Sunday alongside three of her immediate heirs - Charles, William and their eight-year-old son George.