Grease star Dame Olivia Newton-John has sadly passed away at the age of 73, it has been announced.

Following a 30-year battle with breast cancer, Newton-John “died peacefully at her ranch in Southern California Monday morning, surrounded by family and friends."

She is survived by her husband John Easterling and daughter Chloe Lattanzi.

Newton-John received a Golden Globe nomination for her iconic performance as Sandy in Grease, and won four Grammy Awards.

She set up a research facility in Melbourne called the Olivia Newton-John Cancer Wellness & Research Centre before her passing and donations can be made to the Olivia Newton-John Foundation Fund here.

Our thoughts are with her family and friends at this difficult time.