Olivia Newton-John, an icon of 70s cinema thanks to her role as Sandy in 'Grease', has passed away at the age of 73.

Newton-John had been battling breast cancer, and passed away at her ranch in Southern California earlier this morning according to a statement from her family.

The news, published on her Facebook page, stated "Olivia has been a symbol of triumphs and hope for over 30 years sharing her journey with breast cancer."

"We ask that everyone please respect the family’s privacy during this very difficult time."

Newton-John is best-known for her timeless performance in 'Grease' as Sandy, and the film became a major cultural staple of 1970s cinema, with tracks like 'Hopelessly Devoted To You' and 'You're The One That I Want' becoming major pop hits in the process.

Her 'Grease' co-star paid tribute to her on Instagram, saying "My dearest Olivia, you made all of our lives so much better. Your impact was incredible. I love you so much."

"We will see you down the road and we will all be together again. Yours from the first moment I saw you and forever!
Your Danny, your John!"

In addition to being the face of the iconic musical 'Grease', Newton-John also had a series of pop hits, most notably the 1981 hit 'Physical' and the title track for the 1980 film 'Xanadu'.

'Xanadu' is notable for being the final screen appearance of screen legend Gene Kelly, and the film has attained a cult following in the years since.

Born in England but raised in Australia, Newton-John had a strong career as a singer in the 1970s, even representing the UK at the 1974 Eurovision Song Contest.

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