Lord Robert Fellowes, the uncle of Prince William and Prince Harry, passed away at the age of 82 on Monday. The cause of his death remains undisclosed, as reported in his obituary published in the London Times on Wednesday.
Fellowes became Princess Diana's brother-in-law in April 1978 when he married her sister, Lady Jane Fellowes. Princess Diana had the honor of being one of Jane's bridesmaids at their wedding. The couple had three children - daughters Laura, 44, and Eleanor, 38, and son Alexander, 41 - who have not yet made any public statements regarding their father's passing.