Elizabeth II is the princess of the United Kingdom.
Elizabeth II . She is Head of the Commonwealth and Queen of 12 countries that have become independent since her accession : 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 . She is the world 's oldest reigning monarch as well as Britain 's longest-lived .