Actress Jane Fonda has revealed she has been diagnosed with cancer and is having chemotherapy.

Axar.az informs that in a post to her 1.9m Instagram followers, the 84-year-old said she has non-Hodgkin's lymphoma.

Fonda described it as "a very treatable cancer... so I feel very lucky".

The Hollywood icon used her post to highlight the state of healthcare in the US and said she will continue with her climate activism.

She wrote she felt "lucky because I have health insurance and access to the best doctors and treatments.

"I realize, and it's painful, that I am privileged in this.

"Almost every family in America has had to deal with cancer at one time or another and far too many don't have access to the quality health care I am receiving and this is not right."