Elizabeth II is the constitutional monarch of 16 realms of the 53-member Commonwealth of Nations (the “Commonwealth”). She is also the head of the Commonwealth and the Supreme Governor of the Church of England. Upon her accession in 1952, Elizabeth became head of the Commonwealth and queen regnant of seven independent Commonwealth countries (since expanded to 16 realms). She is the longest-lived and, after her great-great grandmother Queen Victoria, the second longest-reigning British monarch. Now 88 years old, Elizabeth was born on this day in 1926.