21st-century queens regnant

Elizabeth II was Queen of the United Kingdom and other Commonwealth realms from 6 February 1952 until her death in 2022. She was queen regnant of 32 sovereign states during her lifetime and was the monarch of 15 realms at her death. Her reign of 70 years and 214 days is the longest of any British monarch, the second-longest of any sovereign state, and the longest of any queen regnant in history.

Queen of Denmark from 1972 to 2024 (born 1940)

Queen of the Netherlands from 1980 to 2013 (born 1938)