Thomas Kingston, a financier who was married to Lady Gabriella Kingston, the daughter of Queen Elizabeth II's cousin Prince Michael of Kent, has died. He was 45.

Buckingham Palace shared the news in a statement Tuesday on behalf of Lady Gabriella and his family.

"Tom was an exceptional man who lit up the lives of all who knew him," the statement reads, per People. "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 later shared their own statement on Kingston's passing.

"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," a statement from a Buckingham Palace spokesperson reads, according to People. "In particular, Their Majesties send their most heartfelt thoughts and prayers to Gabriella and to all the Kingston family."

Kingston was found dead in Gloucestershire, located 100 miles west of London, on Sunday evening, according to the BBC, with no suspicious circumstances suspected.

Kingston and Lady Gabriella Windsor were married at Windsor Castle's St. George's Chapel on May 18, 2019, with guests including the queen and her husband Prince Phillip, Prince Harry and Pippa Middleton.