Princess Anne's mother-in-law, Barbara Alison Laurence, has sadly passed away, it has been announced.
Anne and her husband Timothy Laurence are mourning the sad loss of their loved one, who died peacefully aged 90 on July 2.
The death was reported in the Telegraph, explaining that the mother-of-two passed away at Horsfall House in Minchinhampton.
The Telegraph's notice states that Anne's mother-in-law was the "much beloved widow of Guy" who was her husband.
The family have asked for donations to the Royal National Lifeboat Institution, in lieu of flowers.
The news will no doubt be heartbreaking for the royals, with Anne and Timothy having been married for almost 30 years.
Anne was previously married to Captain Mark Phillips, to whom she shares two children with - Peter and Zara.
After marrying Timothy in 1992, the couple now reside between their residence in London and a country home in Gloucestershire, which isn't far from Minchinhampton.
Anne is known for her incredible work ethic, consistently being recognised as one of the hardest working royals.
Indeed last year, the 68-year-old worked more days than any other royal, attending formal engagements on 180 days.
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In August last year, royal fans were delighted to see a series of beautiful tributes to the radiant royal on her 68th birthday.
The Queen's official Twitter account shared a gorgeous picture of Anne beaming in a bright blue ensemble, which she had worn two months prior to Royal Ascot.
"The Princess Royal has a busy schedule of engagements which see her travel widely across the UK and overseas. #HappyBirthdayHRH," the post was captioned.
The post also recognised Anne's amazing charity work, along with another of her great loves - horses.
Indeed both Anne's mother the Queen herself and Anne's daughter Zara make up a trio of horse fanatics - and their passion has been made patently clear in the achievements they've made in equestrian sports.
"Known for her love of horses and an equestrian career which saw her compete in the 1976 Montreal Olympic Games, Her Royal Highness is involved with riding for the disabled organisations across the Commonwealth," the Twitter caption read.
Our thoughts are with Anne now at this difficult time.