Elizabeth II (Elizabeth Alexandra Mary; born 21 April 1926) is the Queen of 16 of the 53 member states in the Commonwealth of Nations. She is Head of the Commonwealth and Supreme Governor of the Church of England.

Upon her accession on 6 February 1952, Elizabeth became Head of the Commonwealth and queen regnant of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon. Her coronation service the following year was the first to be televised. From 1956 to 1992, the number of her realms varied as territories gained independence and some realms became republics. Today, in addition to the first four of the aforementioned countries, Elizabeth is Queen of Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize, Antigua and Barbuda, and Saint Kitts and Nevis.

The royal style of Queen Elizabeth II is:

"By the Grace of God, of Great Britain, Ireland and the British Dominions beyond the Seas Queen, Defender of the Faith" before her coronation in 1953, then:

"By the Grace of God, of the United Kingdom of Great Britain and Northern Ireland and of Her other Realms and Territories Queen, Head of the Commonwealth, Defender of the Faith" or (in Latin) "Elizabeth II, Dei Gratia Britanniarum Regnorumque Suorum Ceterorum Regina, Consortionis Populorum Princeps, Fidei Defensor".