Today, on what is sure to be a day full of mixed emotions, Queen Elizabeth marks the anniversary of her father King George VI’s death, as well as the anniversary of her taking the throne.

As is often the case, the Queen is expected to be spending the day in private.

Queen Elizabeth II is the longest-reigning monarch Britain has ever seen, so this day also holds a position of historical significance.

On this, the anniversary of her ascending to the throne, here’s a reminder of how long Queen Elizabeth has been ruling.

How many years has Queen Elizabeth been on the throne?

The Queen has reigned since February 6 1952, which makes today the 58th anniversary of her taking the throne.

She became the longest-reigning British monarch in 2015 when, on September 9, she had officially ruled longer than her great-grandmother Queen Victoria, who held the throne for 63 years and 261 days.

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Two years ago, on February 6 2017, Queen Elizabeth became the first British king or queen to celebrate 65 years on the throne, which was marked by a Sapphire Jubilee.

The Queen, now aged 93, was just 25 when her father King George VI died and she took the throne.

The King passed away in his sleep aged 56 at Sandringham House following a battle with lung cancer. He’d ruled since 1936.

Then-Princess Elizabeth was in Kenya on a Commonwealth tour with her husband Prince Philip, Duke of Edinburgh when she heard the news that her father had passed away and she was queen.

The Queen will be succeeded by her son Prince Charles, 71, with his eldest son William, 37, next in line for the throne after his father.

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