Lord Robert Fellowes — Prince William and Harry’s uncle — has died at age 82.
Lord Fellowes, who had served as the late Queen Elizabeth II’s private secretary and was the late Princess Diana’s brother-in-law, died of undisclosed causes on July 29.
His funeral plans have yet not been revealed.
The British courtier had a firm place within the royal fold, and was considered one of the late monarch’s most-trusted advisers during his tenure between 1990 and 1999.
During that time, Fellowes advised the late Queen on the divorces of three of her children, as well as Diana’s death in 1997.
Lord Fellowes was married to Diana’s sister, Lady Jane Fellowes, for 46 years.
At their lavish wedding in 1978, the late Princess of Wales served as a bridesmaid.
The couple went on to welcome three children Alexander Robert, 41, and Eleanor Ruth, 38, and Laura Jane, 44 — who is Princess Charlotte’s godmother.
He rose up the ranks at Buckingham Palace to become deputy private secretary in 1986, before taking over the reins from Sir William Heseltine as private secretary four years later.
Fellowes left his post as private secretary to Her Late Majesty in Feb. 1999 and returned to private banking.
That year, he was made a permanent fixture within the royal family by taking on the title of Baron Fellowes of Shotesham in the County of Norfolk in the Queen’s Birthday Honors List.
He sat as a Crossbench Peer — an individual not belonging to a political party — until his retirement in 2022.
Despite leaving his role as private secretary, Fellowes remained technically a member of the Royal Household.
He remained an Extra Equerry to the late Queen until her death in Sept. 2022 at age 96.
Extra Equerries are honorary appointees that are rarely required for duty, but they can be called upon if needed by senior members of the Firm.
Fellowes boasted a close friendship with Harry and William, and even attended the Prince and Princess of Wales’s wedding at Westminster Abbey in 2011.
He continued to remain close with the now-estranged brothers, and attended the Duke and Duchess of Sussex’s wedding at Windsor Castle in 2018.
Fellowes was portrayed in the hit Netflix series “The Crown.” His character was played by actor Andrew Havill.