Monarchy of the United Kingdom
The monarchy in the United Kingdom and its territories is an institution which provides the British head of state as a king or queen with ceremonial powers. The government of the United Kingdom runs the country in the name of the monarch. The monarchy is therefore a constitutional monarchy, having no real political power, but the Royal Family performs a variety of duties. Since 1952 the head of state has been Elizabeth II, one of the longest-reigning monarchs in world history. She is also Queen of Australia, New Zealand, Canada and 13 other sovereign nations, as well as being head of the Commonwealth of Nations and the Church of England.
The British monarchy is hereditary, in that the eldest son of the monarch has usually become King. For centuries, a daughter would only become Queen if she had no brothers. However, on 28th October 2011, the Queen's 16 prime ministers agreed to bring in legislation to change this. The current heir apparent to the throne is Charles, Prince of Wales.