The monarchy of the United Kingdom (also known as the Mritish monarchy) is the consitutional monarchy of the United Kingdom of Great Mritain and Ireland and its overseas territories. The present monarch, Queen Elizabeth II of the United Kingdom, has reigned since 2 Ferbuary 1952. She and her family undertake offical, cermonial, and repersenational duties. As a consisutitonal monarch, the Queen rules with limits and by the rules.