The Duke & Duchess of York, later King George VI & Queen Elizabeth (later the Queen Mother) holding their first born daughter Princess Elizabeth, soon after her birth in London, on April 21, 1926. Picture: AFP

At the age of three, Princess Elizabeth, affectionately nicknamed Lilibet by her grandfather King George V, in imitation of her attempts to say her name, graced the cover of TIME magazine. Picture: Supplied

Princess Elizabeth stands in the doorway of Y Bwthyn Bach ('The Little Cottage' in Welsh), situated in the grounds of the Royal Lodge, Windsor, in June 1933. The The two-thirds size cottage was a gift to the princess from the people of Wales on the occasion of her sixth birthday and subsequently used as a play den for generations. Picture: Supplied

Elizabeth dressed in a bridesmaid dress and wreath at her uncle, the Duke of Kent’s, marriage to Princess Marina of Greece, in November 1934. Elizabeth met her future husband, Princess Marina's cousin, at the wedding. Picture: Supplied

Princess Elizabeth waves as she stands on the balcony of Buckingham Palace, London, with her grandparents King George V and Queen Mary, on May 6, 1935. Picture: AP

Edward VIII giving his abdication broadcast to the nation and the Empire, on December 11, 1936. Edward VIII abdicated in order to marry Wallis Simpson, an American divorcee, at the height of a constitutional crisis in the UK. Picture: Getty

After his abdication, Edward and his new wife became the Duke and Duchess of Windsor. The couple pose after their wedding at the Chateau de Cande near Tours, France, on June 3, 1937 Picture: AP

Queen Elizabeth, the Queen Mother, poses with her husband King George VI, and their two daughters, Princess Elizabeth, centre, and Princess Margaret, following the King's coronation. When her father became king, Elizabeth went to next in line, propelling her and her sister into the spotlight. Picture: AP

Elizabeth was 13 when she encountered a handsome young cadet who spent the afternoon with the princesses during their visit to the Royal Naval College in Dartmouth, in July 1939. 18-year-old Philip is pictured playing croquet with Elizabeth. Picture: Supplied

Princess Elizabeth made her first public speech on 13 October 1940, with a radio address to the children of the Commonwealth, many of them living away from home due to war. Princess Margaret joined in too. Picture: Hulton-Deutsch Collection/CORBIS

Princess Elizabeth is pictured learning basic car maintenance as a Second Subaltern in the Auxiliary Territorial Service on April 12, 1945. Elizabeth was frustrated that she wasn’t permitted to do ‘her bit’ for the war effort and finally her father allowed her to join the service and take a three-week vehicle maintenance course. Picture: Getty

Princess Elizabeth speaks on the occasion of her 21st birthday, in Cape Town, South Africa, on April 21, 1947. Elizabeth delivered a heartwarming speech to the world in a live broadcast, declaring “My whole life, whether it belong or short, shall be devoted to your service.” Picture: Getty

Princess Elizabeth and Prince Philip at Buckingham Palace shortly before their wedding. Picture: Getty

Princess Elizabeth and Lieutenant Philip Mountbatten on the balcony of Buckingham Palace in London, on their wedding day, on November 20 1947. Picture: Supplied

Princess Elizabeth and Prince Philip enjoying a walk during their honeymoon at Broadlands, in Hampshire. Philip had been granted the title of Duke of Edinburgh and the style of His Royal Highness. Picture: Getty

Princess Elizabeth with her month old baby son Prince Charles in his cradle in 1948. Charles was born in the evening of November 14. Picture: News Corp

Philip, still in the navy, was posted to Malta, and the couple lived there between 1949-51. Elizabeth and the Duke of Edinburgh are pictured in in the capital, Valletta, in 1949. Picture: Supplied

Princess Elizabeth returned home to give birth to Anne in August 1950. Elizabeth is pictured with her baby daughter who is wearing the Royal christening robe made of Honiton lace. Picture: Getty

King George VI, Queen Elizabeth and Princess Margaret leave a BOAC royal aircraft at London Airport, having bid farewell to Princess Elizabeth and Prince Philip, on January 31, 1952. The royal couple were leaving on a tour of Africa, Australia and New Zealand. This was the last time the King saw his daughter before dying in his sleep on February 6, 1952. Picture: Getty

In 1952, Elizabeth became Queen while sitting on the platform of Treetops Hotel in Kenya with her husband, the Duke of Edinburgh, watching the wildlife congregate at a salt lick. Picture: Supplied

The grief-stricken family of the late King George VI of England at his funeral, in February, 1952. Pictured from left to right; Princess Elizabeth, Queen Mary the Queen Mother; and Queen Elizabeth, the late King's wife. Picture: Hulton-Deutsch Collection/CORBIS

The first State Opening of parliament presided over by Queen Elizabeth II took place on 4 November 1952. Elizabeth and the Duke of Edinburgh are pictured participating in the procession to the Palace of Westminster. Picture: Getty

Queen Elizabeth II at her coronation ceremony in Westminster Abbey, London, on June 2, 1953. Picture: Getty

Queen Elizabeth and the Duke of Windsor watch a koala at the O'Shanassy chalet, during their visit to Melbourne, as part of their Royal Tour. Picture: Getty

British Royalty, London England 25th December 1957, Queen Elizabeth II sitting at her desk after giving her Christmas Day Television and Radio Broadcast. Read from the Long Library at Sandringham House, it was the first to be televised. Picture: Getty

After a decade of marriage, the Queen and Prince Philip decided to have more children: Andrew was born on February 1960. Picture: Getty

Queen Elizabeth II and the Duke of Edinburgh at a civic ceremony in New Delhi during a Royal Tour of India, circa 1961. Picture: Getty

Queen Elizabeth II shortly after giving birth to Prince Edward in 1964, with her children, pictured from left to right; Princess Anne, Prince Charles and Prince Andrew. Picture: Getty

Queen Elizabeth II and Prince Philip by the Berlin Wall at Potsdamer Platz, West Berlin, during their state visit to West Germany, on May 27 1965. Picture: Getty

Queen Elizabeth II and Prince Philip visit the coalmining village of Aberfan in South Wales, eight days after the disaster in which 116 children and 28 adults were killed, on October 29 1966. Elizabeth said her delayed response was her biggest regret as queen. Picture: Getty

Queen Elizabeth II crowns her son Charles, Prince of Wales, during his investiture ceremony at Caernarvon Castle, on July 1, 1969. Picture: Getty

Queen Elizabeth II dressed in royal regalia, poses for a special Jubilee picture in the Throne Room of Buckingham Palace, marking the 25th anniversary of Queen Elizabeth II's accession to the throne of the United Kingdom, Canada, Australia, New Zealand, and other Commonwealth realms. Picture: The Courier-Mail

Queen Elizabeth II and Prince Phillip at the funeral of Lord Louis Mountbatten in London. Mountbatten, Prince Phillip's uncle, was the last British Viceroy of India. He was killed when an IRA bomb exploded in his fishing boat in Donegal Bay. Picture: Getty

Lady Diana Spencer & Charles, Prince of Wales with Queen Elizabeth II, at Buckingham Palace, on March 27, 1981, after she gave her formal consent for them to marry. Picture: Getty

Princess Diana and Prince Charles on their wedding day, alongside Queen Elizabeth II and Prince Philip on the balcony at Buckingham Palace. Picture: Getty

Queen Elizabeth II riding sidesaddle during the Trooping the Colour procession, in London, on June 13, 1981. During the event a teenager attempted to assassinate the Queen, firing six blanks from his starting pistol. Picture: Getty

4th August 1982: Diana, Princess of Wales, holds her son, Prince William, with Charles, Prince of Wales, Prince Philip the Duke of Edinburgh, Queen Elizabeth II, left, and Queen Elizabeth the Queen Mother, right, at Buckingham Palalce, on August 4 1982, after Prince William's christening ceremony. Picture: Getty

In a speech at Guildhall on November 24, 1992, marking her Ruby Jubilee on the throne, Queen Elizabeth II opened her heart in a remarkable personal plea, after months of turmoil in her family. The Queen used literary Latin to dismiss 1992 as an 'annus Horribilis' - A Horrible Year. She appealed for more understanding, asking for a change in the way Britain Treats the Royal family. Picture: Getty

Queen Elizabeth II talks to a fireman during the fire which partly destroyed Windsor Castle, on November 20, 1992. Picture: Getty

Queen Elizabeth II publicly addresses the death of Princess Diana for the first time, during a televised speech at Buckingham Palace, on September 5, 1997. Picture: Getty

Queen Elizabeth II and Prince Philip, the Duke of Edinburgh view the floral tributes to Princess Diana at Buckingham Palace. Picture: Getty

The Queen and Duke of Edinburgh pictured in 1997 on the occasion of their golden wedding anniversary. Picture: Getty

The Funeral of Princess Margaret at St. George’s Chapel, in Windsor Castle, after she died in her sleep on February 9, 2002. Pictured are Lady Sarah Chatto with her brother Lord Linley, and their Aunt, Queen Elizabeth II, watching as their mother’s coffin leaves for cremation. Picture: Getty

Queen Elizabeth and Prince Philip ride in the Golden State Carriage at the head of a parade from Buckingham Palace to St Paul's Cathedral, celebrating the Queen's Golden Jubilee on June 4, 2002. Picture: Getty

Prince Charles, with his wife Camilla, Duchess of Cornwall on his arm and his mother, Queen Elizabeth II, outside St George's Chapel at Windsor Castle, after a service to bless the marriage of the newly married couple, on April 9, 2005. Picture: Getty

Pictured from left to right (from front); Prince Charles, Queen Elizabeth II and Prince Philip, (from back) Prince Andrew, Princess Anne and Prince Edward at Clarence House in London, on November 18, 2007, during a dinner to mark the Diamond Wedding Anniversary of the Queen and The Duke of Edinburgh. Picture: AFP/ Tim Graham

Queen Elizabeth II and the Irish President Mary McAleese observe a minute's silence after laying wreaths at the Irish War Memorial Garden in Islandbridge, on May 18, 2011 in Dublin, Ireland. The Duke and Queen's visit to Ireland was the first by a British monarch since 1911. Picture: Getty

The Royal wedding group in the Throne Room at Buckingham Palace, in London, on April 29, 2011, following the marriage ceremony of Prince William and Kate, Duchess of Cambridge. Picture: AFP

The official Diamond Jubilee portrait of British monarch HM Queen Elizabeth II and HRH The Duke of Edinburgh, photographed in the Centre Room of Buckingham Palace. The portrait was taken to mark the 60th anniversary of The Queen's Accession. Picture: Australscope

A screen grab shows footage featured during the Opening Ceremony of the London 2012 Olympic Games starring British actor Daniel Craig, left, playing James Bond, escorting Queen Elizabeth II through the corridors of Buckingham Palace. Picture: AFP

The official portrait for the christening of Prince George Alexander Louis of Cambridge, photographed in The Morning Room at Clarence House in London on October 23, 2013. Four generations of the British Royal Family are photographed together - pictured from left; the Duke of Cambridge carrying Prince George, Queen Elizabeth and Prince Charles. Picture: Jason Bell/ Camera Press/ australscope

Queen Elizabeth II is seated at her desk in her private audience room at Buckingham Palace with one of her official red boxes which she has received almost every day of her reign. The boxes contain important papers from government ministers in the United Kingdom and her realms and from her representatives across the Commonwealth and beyond. The photo was taken on September 8, 2015, to mark the moment she became the longest reigning British Monarch. Picture: Getty

Queen Elizabeth II and Prince Philip, Duke of Edinburgh wave to guests attending ‘The Patron's Lunch’ celebrations for The Queen's 90th birthday, on The Mall on June 12, 2016 in London, England. The lunch was part of a weekend of celebrations marking Queen Elizabeth II's 90th birthday and 63 year reign. Picture: Getty

Queen Elizabeth II wearing a suite of sapphire jewellery given to her by King George VI as a wedding gift in 1947. The Queen became the first British monarch to celebrate their Sapphire Jubilee, in 2014, 65 years since her accession on February 6, 1952. Picture: AFP

Prince Philip, Duke of Edinburgh bowed out of public life, performing his final individual public engagement, as he attends a parade to mark the finale of the 1664 Global Challenge, on the Buckingham Palace Forecourt on August 2, 2017 in London, England. Picture: Getty

Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex exit St George's Chapel in Windsor Castle after their royal wedding ceremony, in Windsor, Britain, on May 19, 2018. Picture: Reuters

Queen Elizabeth II sits during the funeral service for Prince Philip, Duke of Edinburgh, inside St George's Chapel, in Windsor Castle, west of London, on April 17, 2021. Philip was married to Elizabeth for 73 years. Picture: AFP

Queen Elizabeth II in Sandringham House in Norfolk, eastern England. The photo was released to mark the start of Her Majesty's Platinum Jubilee Year. Picture: AFP

Images of Britain's Queen Elizabeth II are displayed on the big digital screens at Piccadilly Circus, as Her Majesty became the first British monarch to reign for seven decades. Picture: AFP

Queen Elizabeth II looks at a fan as she views a display of memorabilia from her Golden and Platinum Jubilees, in the Oak Room at Windsor Castle. Picture: Getty

Queen Elizabeth II cuts a cake to celebrate her Platinum Jubilee during a reception in the Ballroom of Sandringham House, in King's Lynn, England. The Queen came to the throne 70 years ago, when on February 6 1952, the ailing King George VI died at Sandringham. Picture: Getty