The Dowager Countess of Harewood, Patricia Lascelles, has died at the age of 91.
The current Earl of Harewood, David Lascelles, confirmed the news in a statement.
On Saturday afternoon he said: “I am very sorry to announce the death of my step-mother Patricia, who died peacefully after a long illness on 4th May 2018.
“She was at her home, Harewood House, where she had lived during her long marriage to my father and where, since his death in 2011, she has continued to live, in a house they both loved.
“My thoughts are especially with her sons, Michael Shmith and Mark Lascelles, with her brother Barry Tuckwell and with her wider family both here in the UK and in Australia, where she was born and lived the first part of her life.
“Her funeral will be held at Harewood and full details will be announced in due course.”
The Countess was the widow of George Lascelles, 7th Earl of Harewood, who died in 2011.
The Earl was the eldest paternal first cousin of The Queen. They married in Connecticut in 1967.
Patricia was a successful violinist and fashion model in her own right.
A huge football fan, Patricia was Honorary President of Leeds United until her death.