Olivia Newton-John has told fans that "rumours of my death have been greatly exaggerated".

The Grease actress has been diagnosed with cancer for the third time and rumours circulated she was "hanging on to see her daughter get married".

But she released a video on Twitter saying: "Happy New Year everyone, this is Olivia Newton-John and I just want to say that the rumours of my death have been greatly exaggerated, to quote a very famous quote.

"And I am doing great and want to wish all of you the happiest, healthiest 2019 as possible and thank you all for your wonderful love and support for me and for my Olivia Newton-John cancer wellness centre in Melbourne, Australia.

"Thank you so much, Happy New Year."


Earlier, her niece, Tottie Goldsmith, and her management all denied reports of her failing health.

Goldsmith wrote: "Just giving you the heads up that Livvy is in good health, so let's leave that distressing rumor where it belongs."

Her manager told news.com.au that reports of her demise were "hilarious".

Image: Her niece Tottie shared a picture explaining the Grease star was in good health

Her social media manager told The Herald Sun: "We have stated over and over again publicly she's feeling better.

"People just seem to want to believe some dramatic turn."

Newton-John was rumoured to be hanging on to see her daughter Chloe Lattanzi marry fiance James Driskill.

Although they have been engaged since 2010, it is not clear if Lattanzi and Driskill have already married. On one of Lattanzi's social media profiles she dubbed herself "wife of James Driskill" but the marriage has not been confirmed.

Newton-John, 70, was first diagnosed with breast cancer in 1992, and it returned in 2013, this time in her shoulder.

She's spoken about her third battle since 2017, including her use of alternative therapies such as cannabis oil.

Her husband John Easterling grows cannabis at their ranch in California for her treatment.

Her first experience with the illness led her to start the Olivia Newton-John Cancer Research Institute near Melbourne which since claims to be the "leader in the development of immunotherapies, targeted therapeutics and personalised cancer medicine".

Her memoir Don't Stop Believin' will be released at the end of March.