Britain's Princess Elizabeth and her fiance Lieut. Philip Mountbatten pose for camera on September 17, 1947 in White Drawing Room of Buckingham Palace in London in connection with their wedding. The royal couple will marry on November 20, 1947. (AP Photo)

Prince Philip, the Duke of Edinburgh, comments on heads of state during an interview on NBC’s ‘Meet the Press’, recorded in Washington, Nov. 9, 1969, during the prince’s visit last week and broadcast today. The husband of Britain’s Queen Elizabeth II assessed the Soviet President, Presidium Chairman Nikolai Podgorny, as a nonentity outside his own country. (AP Photo/Charles Tasnadi)

Prince Philip of Greece, now Duke of Edinburgh, during a naval visit to Melbourne, Australia, August 29 1945.(AP Photo).

Prince Philip smiles from cockpit of his speed boat after being towed to home of a friend when the vessel broke down as he was boating on the Medina River in Cowes, England on August 7, 1957. The Prince is shown here as he arrives at the home of Uffa Fox, his yachting adviser, at Cowes, Isle of Wight, England with Philip is Prince Charles. (AP Photo)

Swinging the cricket bat is Britain's Prince Philip, Duke of Edinburgh, during cricket match August 3, 1958 at Hampshire, England. (AP Photo)

Wearing the scarlet tunic of the Grenadiers, Queen Elizabeth II holds up 12-week-old son Prince Edward to the crowds gathered outside Buckingham Palace in London, United Kingdom on June 13, 1964, after the traditional Trooping the Color ceremony at nearby Horse Guards Parade. The ceremony marked her official birthday, her 38th, and the Colour trooped was that of the First Battalion of the Coldstream Guards, who leave next month for a tour of duty in Germany. The Queen’s actual birthday was April 21, when it is considered too rainy for outdoor ceremonies. (AP Photo)

The Queen Elizabeth II and the Duke of Edinburgh celebrate 32-years of marriage, Nov. 20, 1979 in Scotland. With them in this picture at Balmoral Castle, are their children (right to left) Prince Andrew, Charles, the Prince of Wales, Prince Edward and Princess Anne with her son Master Peter Phillips. (AP Photo)

Sitting on rugs on the lawn like ordinary folks, the British royal family poses for a picture during a holiday at Balmoral, Scotland in September, 1960. Seated on papa Prince Philip's lap, Prince Andrew shows the smile which friends report he often displays, as Princess Anne fondles his royal toes. Queen Elizabeth II, looks down at her baby while Prince Charles smiles at the cameraman. Prince Andrew will celebrate his first birthday on February 19 minus his parents, away on a tour of India, Pakistan, Nepal and Iran. (AP Photo)

Prince Philip, with Princess Grace and Prince Rainier of Monaco in 1966. (AP Photo)

Britain's Queen Elizabeth II, with her husband Prince Philip, in an open topped car as they leave an event, in Paris, on May 16, 1972. The Queen is on a four day official visit to France. (AP Photo)

Britain's Queen Elizabeth II makes an address next to her husband The Duke of Edinburgh at Westminster Hall in London, Tuesday, March 20, 2012. The Queen celebrated her Diamond Jubilee today by paying tribute to the British virtues of "resilience, ingenuity and tolerance", and to the Duke of Edinburgh, her "constant strength and guide" over the decades. In a landmark address to both Houses of Parliament the monarch repeated her vow made on Accession Day in February to "rededicate myself to the service of our great country". (AP Photo/Kirsty Wigglesworth, Pool)

Britain?s Queen Elizabeth II reads from her statement during the State Opening of Parliament in London on Nov. 12, 1986. She pledged the government would denationalize more state-owned industry and cut taxes while pursuing its main foreign policy goals next year. Her husband, Prince Philip listens at right. (AP Photo)

Britain's Queen Elizabeth II and Prince Philip, fourth and fifth left, watch a Royal Air Force fly pass with their family from the balcony of Buckingham Palace after the Trooping The Colour at the Horse Guards Parade in London, Saturday, June 16, 2012. (AP Photo/Sang Tan)

Britain's Queen Elizabeth II with Prince Philip arrive by horse drawn carriage in the parade ring on the third day, traditionally known as Ladies Day, of the Royal Ascot horse race meeting at Ascot, England, Thursday, June, 16, 2011. Ascot is celebrating its 300 years of horse racing at the Royal Racecourse, that began with Britain's Queen Anne spotting an open heath suitable for racing, the first race run in August 1711, with a prize of some 100 guineas. (AP Photo/Alastair Grant)

Britain's Queen Elizabeth II, left, waves to the crowd with Prince Philip at right, as they arrive by open carriage to the parade ring on the first day of the Royal Ascot horse race meeting in Ascot, England, Tuesday, June 20, 2017. (AP Photo/Alastair Grant)

FILE - In this Tuesday, April 9, 2002 file photo members of Britain's Royal family follow the coffin of the Queen Mother , en route to her funeral in Westminster Abbey in London. They are from left: Prince Andrew, Prince Charles, Prince Philip, Princess Anne and Prince Edward.Britain's Prince Philip on Wednesday Aug. 2, 2017 retires from solo official duties. Over the decades he has become renowned for his stalwart support of his wife, Queen Elizabeth II. (AP Photo/Santiago Lyon, File)

FILE - In this Wednesday July 22, 2020 file photo, Britain's Prince Philip arrives for a ceremony for the transfer of the Colonel-in-Chief of the Rifles from himself to Camilla, Duchess of Cornwall, at Windsor Castle, England. Buckingham Palace says Prince Philip, husband of Queen Elizabeth II, has died aged 99. (Adrian Dennis/Pool via AP, File)

Britain's Prince Philip, in his role as Captain General of the Royal Marines, attends a Parade on the forecourt of Buckingham Palace, in central London, Wednesday Aug. 2, 2017. The 96-year-old husband of Britain's Queen Elizabeth II, Prince Philip made his final solo appearance to mark the finale of the Royal Marines Charity, 1664 Global Challenge. (Hannah McKay/Pool via AP)