Olivia Newton-John has passed away after a long battle with cancer

Beloved Australian actress Olivia Newton-John has sadly passed away. She was 73.

John Easterling, Olivia's husband, says she died peacefully at her ranch in Southern California this morning, surrounded by family and friends.

Posting on social media, Easterling: "Dame Olivia Newton-John (73) passed away peacefully at her Ranch in Southern California this morning, surrounded by family and friends. We ask that everyone please respect the family's privacy during this very difficult time.

"Olivia has been a symbol of triumphs and hope for over 30 years sharing her journey with breast cancer. Her healing inspiration and pioneering experience with plant medicine continues with the Olivia Newton-John Foundation Fund, dedicated to researching plant medicine and cancer. In lieu of flowers, the family asks that any donations be made in her memory to the Olivia Newton-John Foundation Fund.

"Olivia is survived by her husband John Easterling; daughter Chloe Lattanzi; sister Sarah Newton-John; brother Toby Newton-John; nieces and nephews Tottie, Fiona and Brett Goldsmith; Emerson, Charlie, Zac, Jeremy, Randall, and Pierz Newton-John; Jude Newton-Stock, Layla Lee; Kira and Tasha Edelstein; and Brin and Valerie Hall."

While the 'Hopelessly Devoted To You' singer has battled breast cancer for more than 30 years, a specific cause of death has not yet been given.

The Australian singer - who starred in Grease and had a series of hit songs in the '70s and '80s - had previously beaten the illness twice.

Oliva became well-known in 1971 with songs like 'If Not for You,' and in 1973 'Let Me Be There.'

But her big break came in 1978 when she starred as Sandy opposite John Travolta in Grease, belting out songs including 'You're the One that I Want,' 'Summer Nights' and 'Hopelessly Devoted to You.'

Her biggest hit was 'Physical' in 1981, which was at number one in the US charts for 10 weeks, breaking records in the 1980s.

RIP Olivia.