By Charles Clark

REUTERS/Fiona Hanson/Pool

Britain’s Queen Elizabeth and Prince Philip, the Duke of Edinburgh walk at Broadlands in Romsey, southern England.

On Friday, Queen Elizabeth II will celebrate her 91st birthday.

In her 91 years, the record-breaking monarch has pretty much seen it all — she has undertaken more than 260 official overseas visits and has lived through 20 British Prime Ministers and 15 US presidents.

This year’s celebrations are expected to be a low-key affair including the traditional gun salute at Tower Bridge and Hyde Park.

Last year’s celebrations were a much more elaborate, with 1,000 beacons being lit and street parties being held across the country to mark her 90th.

In celebration of her 91st birthday, we’ve found a photo from every single year of her remarkable life.

1926: The Queen was born at 2:40 a.m. on April 21, 1926, at 17 Bruton Street in London. This photo shows the newly-born Princess Elizabeth with her father and mother, the Duke and Duchess of York — later King George VI and Queen Elizabeth.

1927: She was the couple’s first child and was christened Elizabeth Alexandra Mary in Buckingham Palace’s private chapel. She was named Elizabeth after her mother, Mary after her grandmother Queen Mary, and Alexandra after her great-grandmother Queen Alexandra.

1928: No one ever thought Elizabeth would become queen. This only became apparent once her father’s elder brother Edward abdicated, putting her father on the throne, and making her first-in-line.

1929: In this photo, a curious Princess Elizabeth watches on as a Highland Regiment drummer performs in the grounds of Balmoral Castle.

1930: The Queen was home-schooled by her father and the Vice-Provost of Eton, Henry Marten. She also learned French after spending time with French and Belgian governesses and regularly speaks the language when delivering speeches abroad.

1931: She has been a regular attendee of The Royal Tournament at London’s Olympia, the world’s largest military tattoo and pageant. This was one of her earliest visits.

1932: Here, the young princess walks bareheaded through the rain on her arrival home.

1933: This adorable photo shows a 6-year-old Elizabeth playing on a tricycle in the park.

1934: The royals have always been keen equestr