This is a list of British monarchs by longevity since the Union of the Crowns of England, Scotland and Ireland in 1603. To maintain consistency within the table, the dates of birth and death for each monarch are given in New Style. Queen Elizabeth II, the present British monarch (born 21 April 1926; Queen since 6 February 1952), is the longest lived British sovereign, at the age of 90 years, 293 days.