London - Olivia Newton-John's sister Rona Newton-John has died.
The 64-year-old actress' older sibling passed away on May 24 in Los Angeles surrounded by her family and friends after suffering with an aggressive brain tumour.
Poignantly, the date of Rona's death would have been May 25 in Australia - where the family lived after emigrating from the UK when Olivia was six - the same date as their mother Irene.
In a post on her Facebook page, Olivia revealed: "My beautiful sister Rona sadly passed on May 24th in Los Angeles. It was May 25th in Australia - which was our mother Irene's birthday.
"Rona died of a very aggressive brain tumour and mercifully suffered no pain. She was surrounded by the love of her four children - Fiona, Brett, Tottie and Emerson - and her wonderful friends. I will miss her forever - my beautiful, smart, talented, funny, brave sister Rona."