Dieu et mon droit, which means 'God and my right', is the motto of the monarch of the United Kingdom. It appears on a scroll beneath the shield of the version of the coat of arms of the United Kingdom. The motto is said to have first been used by Richard I (1157–1199) as a battle cry and presumed to be a reference to his French ancestry and the concept of the divine right of the monarch to govern. It was adopted as the royal motto of England by King Henry V (1386–1422) with the phrase "and my right" referring to his claim by descent to the French crown.

The coat of arms of the United Kingdom are the arms of dominion of the British monarch. They are both the personal arms of the monarch, currently King Charles III, and the arms of the state. In addition to the monarch, the arms are used by state institutions including the Government of the United Kingdom, the Parliament of the United Kingdom, and the British judiciary. Differenced versions of the arms are used by members of the British royal family. The monarch's official flag, the Royal Standard, is the coat of arms in flag form.