The monarchy of the United Kingdom, commonly referred to as the British monarchy, is the constitutional form of government by which a hereditary sovereign reigns as the head of state of the United Kingdom, the Crown Dependencies and the British Overseas Territories. The current monarch is King Charles III, who ascended the throne on 8 September 2022, upon the death of his mother, Queen Elizabeth II.
The monarch and their immediate family undertake various official, ceremonial, diplomatic and representational duties. The monarchy is 'constitutional', meaning that,
although formally the monarch still has authority over the governmentwhich is known as "His/Her Majesty's Government"this power may only be used according to laws enacted in Parliament and within constraints of convention and precedent. Thus in practice the monarch's role, including that of Head of the British Armed Forces, is limited to functions such as bestowing honours and appointing the prime minister, which are performed in a non-partisan manner. The UK Government has called the monarchy "a unique soft power and diplomatic asset". The Crown also occupies a unique cultural role, serving as an unofficial brand ambassador for British interests and values abroad, increasing tourism at home, and promoting charities throughout civil society.
The British monarchy traces its origins from the petty kingdoms of Anglo-Saxon England and early medieval Scotland, which consolidated into the kingdoms of England and Scotland by the 10th century. England was conquered by the Normans in 1066, after which Wales also gradually came under the control of Anglo-Normans. The process was completed in the 13th century when the Principality of Wales became a client state of the English kingdom. The Anglo-Normans also established the Lordship of Ireland. Meanwhile, Magna Carta began the process of reducing the English monarch's political powers. In the 16th century, English and Scottish monarchs played a central role in what became the religious English Reformation and Scottish Reformation, and the English king became King of Ireland.