The life of Queen Elizabeth II
Updated 1836 GMT (0236 HKT) April 17, 2021
Since 1952, there have been seven Popes, 14 US Presidents and 13 British Prime Ministers.
But there's only been one British monarch.
Queen Elizabeth II has reigned for 69 years, which is longer than any British monarch in history and any current monarch in the world.
She was 25 years old when she ascended to the throne.
Look back at her life in the public spotlight: