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President of the United States, Lyndon Baines Johnson (1908-1973) stands on right with Princess Margaret (1930-2002), his wife, Lady Bird Johnson (1912-2007) and, on left, Antony Armstrong-Jones, 1st Earl of Snowdon at a state dinner for the royal couple at the White House in Washington DC on 17th November 1965. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

President of the United States, Lyndon Baines Johnson (1908-1973) stands on right with Princess Margaret (1930-2002), his wife, Lady Bird Johnson (1912-2007) and, on left, Antony Armstrong-Jones, 1st Earl of Snowdon at a state dinner for the royal couple at the White House in Washington DC on 17th November 1965. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)