Billy Joel is "doing great" amid his battle with a brain disorder, his daughter Alexa Ray Joel has revealed.

The Piano Man artist, 76, was forced to cancel his tour dates last year after being diagnosed with Normal Pressure Hydrocephalus - a neurological condition that impacts balance, vision and hearing - but Alexa Ray is encouraged by her father's efforts to improve his health.

Alexa Ray told The Hollywood Reporter: "He's doing physical therapy regularly and he's doing great. He's lost weight as he's on a diet.

"I'm so proud of him. He's such a trooper, so resilient and so committed to being healthy and proactive. He's a fighter. He's always been a fighter and talks in his documentary (Billy Joel: And So It Goes) about how life's like a fight."

Billy's diagnosis came after he fell on stage during a performance during a show in Connecticut and Alexa Ray explained that she was left "crying" when she watched footage of the incident despite the Uptown Girl singer trying to brush it off.

The 40-year-old star - the daughter of Billy and his supermodel Christie Brinkley - said: "He played it down. He knows I have anxiety and am a neurotic worrier, so he was like, 'Everything's fine. It was just a little trip.' When I saw the footage, I was crying. But then I went with him to the doctors, and we're on top of everything. I just tell him to stay healthy."

Alexa Ray is forging her own path in the music industry and admits that she found it difficult trying to live up to the family name at first.

She said: "When I started out, I did feel that pressure, hence my first single - Notice Me. There was a desperation and sense of, 'Look at me. I have something of my own to offer.' I had a lot to prove and was craving validation. I think of Dad's song, Pressure, and I definitely felt that.

"Now that I've dug my heels into the industry and become more comfortable with asserting my own voice, some of that pressure's died down. Thinking 'I have to live up to my last name' is so unhealthy. I struggle with anxiety and depression, so if I lean too much into the pressure, it drives me crazy."