To celebrate the Queen turning 89 years old we have picked out a selection of images of HRH at Buckingham Palace that capture some landmark moments from years gone by.

The Queen is set to become the longest ever reigning monarch in British history. On September 9 2015, she will pass the record set by her great-great-grandmother Queen Victoria. Buckingham Palace has calculated that Queen Victoria reigned for 23,226 days, 16 hours and 23 minutes, taking into account 63 years, 15 leap days, additional months and days and the precise timings of her accession and death.

Queen Elizabeth II will enter the history books when she overtakes Victoria during September 9 2015. This takes into account 63 years plus 16 leap days, additional months and days and the timing of George VI’s death.

Christening Of Queen Elizabeth II. Royal family portrait on the occasion of the christening of Princess Elizabeth Alexandra Mary, later Queen Elizabeth II, in the private chapel of Buckingham Palace on 29th May 1926. Left to right: Lady Elphinstone, Duke of Connaught, Queen Mary, King George V, Duchess of York and baby, Duke of York, Countess of Strathmore, Earl of Strathmore and Princess Mary the Viscountess Lascelles. (Photo by Popperfoto/Getty Images)

Silver Jubilee. The future Queen Elizabeth II waving from the balcony of Buckingham Palace in London, with her younger sister Margaret and her grandparents King George V and Queen Mary, on the occasion of their Silver Jubilee, 6th May 1935. (Photo by Central Press/Hulton Archive/Getty Images)

George VI Coronation. King George VI (1895 - 1952) (right) and Queen Elizabeth with Queen Mary (centre), Princesses Elizabeth (left) and Margaret Rose (1930 - 2002) and members of the extended Royal Family on the balcony of Buckingham Palace after their Coronation ceremony.

Painting Princesses. 22nd June 1940: Princess Margaret Rose (1930 - 2002) and Princess Elizabeth (right) working on paintings in the school room of Buckingham Palace, London.

Royal Family. May 1942: King George VI with his family at Buckingham Palace. Left to right - Princess Margaret (1930 - 2002), Queen Elizabeth, Princess Elizabeth and King George VI.

Princess Elizabeth of England (future queen Elizabeth II) young wearing girl scout uniform (she is a member of the Buckingham Palace Company of Girl Guides) in 1943

Royal Stamps. July 1946: Princess Elizabeth looking through her stamp collection in the State Apartments at Buckingham Palace.

Working Princess. 19th July 1946: Princess Elizabeth working at her desk in Buckingham Palace.

Royal Engagement. Princess Elizabeth (later Queen Elizabeth II) and her fiance, Philip Mountbatten at Buckingham Palace, after their engagement was announced, 10th July 1947.

20th November 1947. Buckingham Palace, London. The wedding of Princess Elizabeth and the Duke of Edinburgh showing the Princess looking radiant after the wedding at Westminster Abbey.

Wedding Mass. 20th November 1947: Crowds gathered around the Victoria Monument in front of Buckingham Palace, London, on Princess Elizabeth’s wedding day.

Spectators Use Periscopes. Two women using periscopes to see over the crowd outside Buckingham Palace on the wedding day of Princess Elizabeth (later Queen Elizabeth II) and Philip Mountbatten, Duke of Edinburgh, London, 20th November 1947.

Royal Couple. 20th November 1947: Princess Elizabeth and The Prince Philip, Duke of Edinburgh waving to a crowd from the balcony of Buckingham Palace, London shortly after their wedding at Westminster Abbey.

Baby Prince Charles. Princess Elizabeth poses with her baby son Prince Charles at Buckingham Palace, after his christening, 15th December 1948.

HM Queen Elizabeth II at Buckingham Palace, 12th March 1953. The Queen is shown wearing the Diamond Diadem, the sash, badge and star of the Order of the Garter, and the Greville Chandelier earrings.

Coronation Balcony. Queen Elizabeth II on the balcony of Buckingham Palace after her Coronation ceremony with (left to right); Prince Charles, Princess Anne and The Prince Philip, Duke of Edinburgh.

Buckingham Palace, London , England, 15th June 1961, Prior to a banquet in honour of the President of the United States, HRH Queen Elizabeth II ( second right) with Prince Philip ( far left) together with American President John F, Kennedy ( far right) and his wife and First Lady Jacqueline.

Smiling Queen. 10th June 1966: Queen Elizabeth II smiling at a Colonel of the 1st Battalion of the Irish Guards during a presentaion of colours ceremony at Buckingham Palace, London.

Silver Wedding. 20th November 1972: Queen Elizabeth II and the Duke of Edinburgh with their children (left to right); Charles, Prince of Wales, Prince Edward, Prince Andrew, Princess Anne celebrating their silver wedding anniversary at Buckingham Palace.

Queen Elizabeth II with the Apollo 11 astronauts at Buckingham Palace, 1970. Left to right: Michael Collins, Neil Armstrong and Edwin ‘Buzz’ Aldrin.

Queen With Canadians. Queen Elizabeth II at Buckingham Palace with a group of indigenous Canadians, during their visit to the UK in 1973.

Queen And President. Queen Elizabeth II with US President Jimmy Carter in the Blue Drawing Room at Buckingham Palace, London, 10th May 1977. Carter and other NATO heads of state are attending a dinner at the palace during the 1977 London summit.

Silver Jubilee. 28th June 1977: Queen Elizabeth II with Princess Anne, Earl Mountbatten (1900 - 1979) and the Duke of Edinburgh on the balcony of Buckingham Palace during her Silver Jubilee.

Queen, Charles And Diana. The Queen On The Balcony Of Buckingham Palace With The Prince And Princess Of Wales On Their Wedding Day With Their Pageboys Lord Nicholas Windsor And Edward Van Cutsem, And One Of Their Bridesmaids Clementine Hambro.

Queen Pope Buckingham Palace. Historic Meeting Pope John Paul II, Head Of The Catholic Church, Visiting The Queen, Head Of The Church Of England, At Buckingham Palace.

Queen Rain Trooping Grimace. The Queen Suffers A Downpour Of Rain During The Final Salute At Buckingham Palace, After The Trooping Of The Colour Ceremony. She Rides Sidesaddle On Her Horse 'burmese’ Which Was A Gift To Her From The Canadian Mounted Police.

Queen Elizabeth II presents US President Ronald Reagan with an honoury Knighthood on June 14, 1989 at Buckingham Palace in London. Left to Right are Ronald Reagan, Queeen Elizabeth II, and the President’s wife Nancy Reagan.

Robert Mugabe of Zimbabwe visit to the UK. President Robert Mugabe of Zimbabwe is greeted by Queen Elizabeth ll and Prince Phillip the Duke of Edinburgh at Buckingham Palace, London during his State Visit to England in May of 1994.

The Queen And Prince Philip With President Bill Clinton And His Wife Hillary At Buckingham Palace

Queen With The Emir Of Qatar. The Queen With The Emir Of Qatar, Sheikh Hamed Ibn Khalifa Al-thani, At Buckingham Palace.

Queen Profile Smiling. The Queen At Buckingham Palace During A Visit By The President Of Singapore.

The Prince of Wales raises his glass in response to a toast from his mother, Queen Elizabeth II, during a reception in his honour on the eve of his 50th birthday at Buckingham Palace on November 13th, 1998 in London, England.

President Obama And The First Lady Meet The Queen. US President Barack Obama and his wife Michelle Obama pose for photographs with Queen Elizabeth II during an audience at Buckingham Palace on April 1, 2009 in London, England.

The Wedding of Prince William with Catherine Middleton. Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, HRH Queen Elizabeth II (2nd from R) and Prince Philip, Duke of Edinburgh ® greet crowd of admirers from the balcony of Buckingham Palace on April 29, 2011 in London, England.

Queen Elizabeth II and Prince Philip, Duke of Edinburgh look at the crowds from the balcony of Buckingham Palace following the Royal Wedding of Their Royal Highnesses Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge at Westminster Abbey on April 29, 2011 in London, England.

Britain’s Queen Elizabeth II is pictured after recording her Christmas Day broadcast to the Commonwealth, in the State Dining Room at Buckingham Palace in central London, on December 10, 2014.