Get ready to watch the Opening Ceremony: Heads of state
An Olympic Games is not officially considered open until a dignitary declares them as such. This duty generally falls to the head of state of the host nation. The Games have been opened by kings, queens, emperors, U.S. Presidents and even one of the most notorious figures in modern history.
While commandeering the Olympic Games for the propaganda machine of the Third Reich, Adolf Hitler took advantage of his position of power and opened the Games held in Berlin in 1936.
Queen Elizabeth II became the first person to open multiple Olympic Games in 2012, having also opened the Games in Montreal in 1976. In 1976 the Queen wore pink, and opted for a peach-colored frock in 2012. As Monarch of Australia, the Queen would have been well within her rights to have opened the 2000 Sydney Olympics, but she decided to bestow the honor to then Governor General of Australia, Sir William Deane.
The Queen's father, King George VI, opened the London Olympics in 1948, but Elizabeth was not in attendance, presumably resting at home, pregnant with Prince Charles, who would be born that November.
Despite four being staged on U.S. soil, only two U.S. Presidents have opened a summer Olympic Games: President Bill Clinton in 1996 in Atlanta and President Ronald Reagan in Los Angeles in 1984. The remaining two, St. Louis 1904 and Los Angeles 1932 were opened by David Francis, President of the Louisiana Purchase International Exposition of the 1904 World's Fair and U.S. Vice President Charles Curtis, respectively.