Longest reigning  monarch (living)
Her Majesty Queen Elizabeth II
67:74 year(s):day(s)
Not Applicable ()

The longest-reigning living monarch is Her Majesty Queen Elizabeth II (UK, b. 21 April 1926), who succeeded to the throne on 6 February 1952 on the death of her father, King George VI. As of 21 April 2019, Queen Elizabeth II had reigned without interruption for 67 years 74 days.

Queen Elizabeth II became the longest-reigning living monarch on 13 October 2016, upon the death of His Majesty King Bhumibol Adulyadej of Thailand.