Olivia Newton-John, known for films ‘Grease’, ‘Xanadu’ dies at 73 #English, Dunia August 9, 2022 8:56 PM HOUSTON (United States), 9 Aug : Olivia Newton-John, the singer and actress who starred in the films “Grease” and “Xanadu,” died Monday at her home in California at the age of 73.