PRINCE and Princess Michael of Kent put on a brave face and attended a memorial just over a day after their son-in-law's death.
Thomas Kingston, married to their daughter Lady Gabriella Windsor, was found dead at an address in Gloucestershire around 6pm on Sunday.
Lady Gabriella's parents attended a Thanksgiving service held in honour of Greece’s late King Constantine this morning, over a day after the 45-year-old was found.
Her Majesty Queen Anne-Marie, former Queen of the Hellenes and His Royal Highness Crown Prince Pavlos, along with other members of the Greek Royal Family, were at Windsor Castle.
The ceremony was held at St George's Chapel - where Thomas and Lady Gabriella were married in 2019.
Prince William and the King were also set to attend, but both had to pull out.
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An inquest will be held to establish Thomas' cause of death, but there are no suspicious circumstances and no other parties involved.
A statement on behalf of his loving wife and family said: "It is with the deepest sorrow that we announce the death of Thomas Kingston, our beloved husband, son and brother.
"Tom was an exceptional man who lit up the lives of all who knew him. His death has come as a great shock to the whole family and we ask you to respect our privacy as we mourn his passing."
King Charles and Queen Camilla also paid tribute.
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Their statement reads: "The King and The Queen have been informed of Thomas’s death and join Prince and Princess Michael of Kent and all those who knew him in grieving a much-loved member of the family.
"In particular, Their Majesties send their most heartfelt thoughts
and prayers to Gabriella and to all the Kingston family."
The Prince of Wales informed the Greek Royal family he could not attend the service due to a personal matter.
Meanwhile, King Charles, 75, was at Windsor this morning but left before the ceremony began as he continues to bravely battle with cancer following his shock diagnosis.
Prince Andrew instead led the Royals present.
Andrew was seen beaming as he led the way in a rare public appearance as mourners arrived for the service.
Gloucestershire Constabulary has said it was called by the ambulance service about the death of Thomas Kingston, the husband of Prince and Princess Michael of Kent's daughter Lady Gabriella Kingston.
The force said: "We were called by the ambulance service at 6.25pm on Sunday with a report of the death of a 45-year-old man at an address in the Cotswolds.
"The death is not being treated as suspicious and a file will be prepared for the coroner."
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Thomas' wife, Lady Gabriella Windsor, is the daughter of Prince and Princess Michael of Kent.
The late Queen and Prince Michael were first cousins through their fathers.
Who was Tom Kingston?
Thomas worked in frontier market investment, and was the director of Devonport Capital.
He was once described as "the most eligible man in London" and previously dated Pippa Middleton in 2011.
Thomas graduated from the University of Bristol with a bachelor's degree in economic history, according to .
He worked in the Diplomatic Missions Unit of the United Kingdom's Foreign Office, and for almost three years worked in Baghdad as a project officer for the Iraqi Institute of Peace.
His job was to mediate conflicts in Iraq, and he even helped negotiate the release of hostages.
Thomas then moved into finance, working as an equity analyst for global asset management firm Schroders.
He was managing director of Voltan Capital Management until April 2017.
In September 2018, it was announced that Thomas was engaged to Lady Gabriella Windsor.