Elizabeth II, the most popular woman in the United Kingdom, celebrated her 90th birthday on April 21. The monarch's life turned to be longer than lives of other political figures whom she met during the period of her reign. The irreplaceable Queen of the UK is considered to be the oldest leader on the planet.

In the picture there is Queen Elizabeth II (on the right in the bottom row) with her family. Next to her is Prince William with his wife Kate, great-grandson George and great-granddaughter Charlotte. In the background there is Elizabeth's husband Duke Phillip with Prince Charles and his wife Camilla on the left.

Many believe that Elizabeth II doesn't possess the real power, as the British policymakers make the key political decisions. Despite such an opinion, the Queen is always busy with official meetings, conversations with Prime Minister David Cameron; she often participates in public events.

In the picture there is Queen Elizabeth II meeting with Russian President Vladimir Putin. The Queen's husband Duke Phillip and Putin's former wife Lyudmila are accompanying the politicians.

Many wonder how the Queen manages to keep healthy as few politicians are able to govern a country being in such a venerable age. Some believe that the important and positive thing in Elizabeth's life is her strong marriage with Duke of Edinburgh Philip. They made their marriage vows 69 years ago. Philip, who is now 94 years old, is the first and only Elizabeth's husband.

In the picture there is Queen Elizabeth II with Duke of Edinburgh Philip and their children – Prince Charles and Princess Anna.

Elizabeth ascended the British throne in 1952. The young wife and mother of two small children didn't plan to become the Queen of the UK, but it was destined to happen.

Duke of Edinburgh Philip was the first who recited the oath of allegiance to the new monarch.

In the picture there is the coronation of Queen Elizabeth II, 1952.

In the picture there is Queen Elizabeth with her grandchildren and great grandchildren, 2016. The Queen is holding her great granddaughter Charlotte.

Interestingly, Elizabeth is connected with the Romanov dynasty. George V, the queen's father, was a cousin of the last Emperor of the Russian Empire Nicholas II.

In the picture there is Queen Elizabeth II, 27 May 2015.

The current British Queen is the world's oldest politician and at the same time her period of reign is the longest in the history of Great Britain.

In the picture there is Elizabeth's pets – Corgies Willow and Holly and Dorgies Vulcan and Candy.

In the picture there is Queen Elizabeth II at the age of 13.

In the picture there is Queen of the United Kingdom with her daughter Anna, 2016.

In the picture there is the British Queen chatting with the Pepper robot.

In the picture there is Elizabeth II looking at the scenery from "Game of Thrones".

In the picture there is Queen Elizabeth II with her husband Duke of Edinburgh Philip, 2012