The Royal Titles Act 1953 (1 & 2 Eliz. 2. c. 9) is an Act of the Parliament of the United Kingdom. It authorizes the Queen to alter her style and titles for the United Kingdom as well as territories whose foreign relations are under the responsibility of Her Majesty's Government in the United Kingdom.

Royal Titles Act 1953

Act of Parliament
United Kingdom
Long title	An Act to provide for an alteration of the Royal Style and Titles.
Citation	1 & 2 Eliz. 2. c. 9
Dates
Royal assent	26 March 1953
Status: Current legislation
Text of the Royal Titles Act 1953 as in force today (including any amendments) within the United Kingdom, from legislation.gov.uk.

A royal proclamation was made under the Act on 28 May 1953. It defined the Queen's titles as:^[1]

• in English:

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

• in Latin:

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