This successor of George VI has reigned since 1952 and is the longest currently-reigning monarch in the world.
-year-old Marcus Sarjeant attempted to become famous by firing six blanks from his revolver at this ruler. Using his powers as this ruler's appointed representative, John Kerr dismissed Gough Whitlam from his position in a constitutional crisis. This ruler's younger sister had a brief whirlwind romance with Peter Townsend which was unveiled to the media after this ruler's coronation. A series of unhappy events during the 40th anniversary year of this ruler's reign caused her to dub it her annus horribilis. This successor of George VI has reigned since 1952 and is the longest currently-reigning monarch in the world. For 10 points, name this current queen of the United Kingdom.
-year-old Marcus Sarjeant attempted to become famous by firing six blanks from his revolver at this ruler.
Elizabeth II [prompt on Elizabeth]