Olivia Newton-John, a British-born Australian actress and singer, died at age 73 on Monday (8) at a ranch in Southern California, surrounded

by friends and family, her husband John Easterling said. She starred alongside John Travolta in the film "Grease: In the Time of Brilliance" (1978) and had a successful career in music.

Olivia was diagnosed with breast cancer with metastasis to the sacrum bone in 2018, after having overcome other

tumors in 1992 and 2015. In a statement, her husband asked that they "respect the privacy of the family during this very difficult time."

"Olivia was a symbol of successes and hope for over 30 years sharing her journey with breast cancer. Her healing inspiration and pioneering expertise

with medicinal plants continues with the Olivia Newton-John Foundation Fund, dedicated to research on medicinal plants and cancer," wrote John Easterling, the artist's widower.

"In lieu of flowers, the family asks that any donations be made in her 

memory to the Olivia Newton-John Foundation Fund (ONJFoundationFund.org)."

In her five-decade career, Olivia also starred in such films as "Xanadu" (1980). 

As a singer, she sold over a hundred million albums, which had hits like "Physical."