But Foy, inhabiting Elizabeth from 1947 to 1964, is instantly recognisable as the woman who would become Britain’s longest-reigning monarch.

Source: https://www.independent.co.uk/arts-entertainment/tv/features/the-crown-best-worst-actors-b2445279.html

Denmark's Queen Margrethe II, Europe's longest-reigning living monarch, announced she plans to leave the throne to make way for her son, Crown Prince Frederik, on the 52nd anniversary of her own accession.

Source: https://bc.ctvnews.ca/11-more-temperature-records-fall-in-b-c-as-warm-stretch-continues-1.6706456

Morales' time as Champion clocked in at 1,027 days, placing Reigns fourth on the longest-reigning WWE World Championship list.

Source: https://comicbook.com/wwe/news/roman-reigns-achieves-impressive-wwe-champion-milestone-pedro-morales/

SANADA is now the longest-reigning IWGP World Heavyweight Champion of all time.

Source: https://411mania.com/wrestling/sanada-record-iwgp-world-heavyweight-title/

The Great was a satirical, comedic drama centered around the rise of Catherine the Great through 18th Century Russia from outsider to the longest-reigning female ruler in Russia’s history.

Source: https://www.comingsoon.net/tv/news/1329631-the-great-canceled-by-hulu-after-season-3