Charlie Sheen is embracing a vegan diet.

Charlie Sheen

Charlie Sheen

The 'Anger Management' star - who revealed in 2015 he is HIV-positive - has been following the health plan for the past two weeks as part of a fitness drive he's on with his new girlfriend Julia Stambler.

Sources told gossip website TMZ that the 51-year-old actor has been waking up early to go swimming and do yoga, and he's been eating plenty of rice and veggie burgers, and washing those down with coconut water coffee.

Charlie previously claimed he's been off hard drugs for a year and rarely touches alcohol nowadays, but recently admitted he has been suffering with "borderline dementia" due to the cocktails of medication he has to take to manage HIV.

He said: "[The drugs] kept me suppressed and alive, but I struggled with a constant migraine and at times, borderline dementia."

But the star also insisted he is beginning to feel like his old self again.

He said: "I've started to feel back to myself again and back in touch with all aspects of my life.

"When I was first diagnosed, I knew it wasn't a death sentence but it was just a giant frickin' bummer.

"I accept the gift of being alive. I could run and hide from this whole thing and not be outspoken and honest and open about it, but I've chosen a path that's the opposite."

In June, it was revealed Charlie was dating 26-year-old Julia, the former nanny of his eight-year-old twins Bob and Max, who he shares with ex-wife Brooke Mueller.

Charlie and Julia, a bikini model and actress, are thought to have got together in March.

The former 'Two and a Half Men' star's vegan diet isn't the first time he's been on a health kick.

In June 2016, the actor admitted he was concentrating on working out and eating better.

He said at the time: "Now it's exercise, diet. I don't go on benders, don't drink as much.

"It was a combination of a lot of self-loathing, a lot of shame that was behind it. I just wanted to keep myself divorced from reality. I just woke up one day and said, 'I deserve better.'"