Her Majesty The Queen

The precise style of British sovereigns has varied over the years. The present^[update] style is officially proclaimed in two languages:

Elizabeth II, by the Grace of God of the United Kingdom of Great Britain and Northern Ireland and of Her other Realms and Territories Queen, Head of the Commonwealth, Defender of the Faith

Elizabeth II, Dei Gratia Britanniarum Regnorumque Suorum Ceterorum Regina, Consortionis Populorum Princeps, Fidei Defensor

From about the 12th century onwards, English sovereigns used the style "Highness". They shared this style with only five other monarchs in Europe: the Holy Roman Emperor and the Kings of France, Castile, Aragon and Portugal. Around 1519, however, the Holy Roman Emperor and the King of France assumed the style "Majesty"; Henry VIII copied them. The style "Majesty" had previously appeared in England, but did not become common until Henry VIII's reign.

"Majesty", however, was not used exclusively; it arbitrarily alternated with both "Highness" and "Grace", even in official documents. For example, one legal judgment issued by Henry VIII uses all three indiscriminately; Article 15 begins with "the Kinges Highness hath ordered", Article 16 with "the Kinges Majestie" and Article 17 with "the Kinges Grace".

...
Wikipedia