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From official engagements to a traditional horse ride - Queen Elizabeth II has marked the occasion of her birth in all manner of ways.
The day after her fourth birthday in 1930, a tiny Princess Elizabeth took a carriage ride around Windsor with her cousins Viscount George Lascelles and Gerald Lascelles.
The princess clearly had a love for ponies from an early age and spent her 10th birthday riding her new white horse in Windsor Great Park accompanied by her riding master.
In 1937, on her 11th birthday, Princess Elizabeth had a formal portrait taken with her mother Queen Elizabeth and sister Princess Margaret Rose.
On her 14th birthday in 1940, she picked daffodils in Windsor Great Park dressed in full riding attire.
During her 16th birthday parade at Windsor Castle in 1942 she shook hands with officers of the Grenadier Guards.
The night before this photo was taken, the princess shared her 23rd birthday with 300 visitors to the Cafe De Paris and hundreds more Londoners who crowded the pavement to wish her well. She also saw Sir Laurence Olivier and Vivien Leigh in a theatre production of The School For Scandal.
To celebrate turning 18 in 1944, the adult princess sat for a portrait with family members. Seated: Queen Mary, King George VI, Princess Elizabeth, Queen Elizabeth; Standing: the Duke and Duchess of Gloucester, Princess Margaret Rose, Princess Royal Marion, the Duchess of Kent and Lord Harewood.
The princess celebrated her 21st birthday in South Africa in 1947. Here she is pictured on the day sitting in Natal National Park.
Pregnant with her second child, due in the summer, Princess Elizabeth and the Duke of Edinburgh celebrated her 24th birthday with a stay at Earl Mountbatten's villa in Malta. She was visiting her husband who was on duty with the British Navy.
It was back to the horses for her 35th birthday but this time she was watching riders at the finish line of the Horse Trials at Badminton in 1961 with her 12-year-old son, Prince Charles.
In 1965, Prince Andrew was at the handle of the pram in this photo, rocking his brother Prince Edward, while watched by his mother Queen Elizabeth II on her birthday, Princess Anne, the Prince of Wales and his father, the Duke of Edinburgh.
Three years later, on the day Queen Elizabeth II turned 42, the Royal Family were seen posing in the gardens at Frogmore again for special birthday photographs.
On her 60th birthday, the Queen took to the balcony of Buckingham Palace with her husband Prince Philip, their son Prince Andrew and his fiancee Sarah Ferguson, to wave to wellwishers in 1986.
The Queen returned to Windsor Great Park for a traditional birthday horse ride back in 1991.
Proving that even the Queen can't guarantee the best of the British weather on her birthday, she grimaced under an umbrella as the rain came down on her special day at the Dubai Duty Free Spring Trials, Newbury in 2012.
Celebrations were huge as the Queen turned 80 in 2006. Here she received a gift from wellwishers during a walkabout in Windsor.
To mark her 80th birthday, the Queen went for dinner at Kew Palace with Prince Andrew, Princess Eugenie, the Duchess of Kent, Prince Charles, Camilla Duchess of Cornwall, Prince William, Zara Phillips, Prince Harry, Prince Philip, Princess Royal and Tim Lawrence.
The Queen even shared her 80th with 100 pensioners who were all born on the same day as her and had been invited to a special lunch at Buckingham Palace. Mrs Edna Richards of Bilston, West Midlands was one of the lucky ones.
The Royal family also attended a service of thanksgiving at St George's Chapel, Windsor, to mark the occasion.
In 2007, on her 81st birthday, the Queen went riding in the grounds of Windsor Castle.
Duty calls and some of the Queen's big days have been spent performing official duties. In 2011 her 85th birthday fell on Maundy Thursday for the first time. The Queen and the Duke of Edinburgh attended the traditional Royal Maundy Service at Westminster Abbey.