Zac Brown has "retired from drinking" as part of his healthy new lifestyle.

The 47-year-old country star has undergone a huge change in recent months after deciding to overhaul his diet and exercise regime - cutting out booze along with sugar and dairy - and working out with a former NFL trainer.

Zac admits his gruelling new routine takes a lot of discipline, but he's fully committed. He told GQ magazine: "Nobody could have told me that I needed to stop drinking before I knew that it was time to do it.

"But there were times when I had hangovers and I'd look at myself in the mirror and go: 'One day, I'm not going to do this anymore.'

"You kind of feel like [alcohol] is this feel-good friend that's always around, that's whatever, but nobody's life gets better because they quit drinking. And I can testify to that a hundred per cent."

Zac added: "I had a great drinking career, and I'm retired from it now. "

The musician went on to reveal he took lifestyle advice from veteran rocker Bruce Springsteen and put it into practice.

He said: "I asked Bruce Springsteen when I first met him to tell me something that was invaluable to his career. He said: 'I sweat for an hour a day, no matter where I am, what I'm doing, I sweat for an hour a day.'

"He's like: 'It'll change your life.' I started doing that when I was home or even on the road. I built a trailer that has a full gym in it."

As well we working hard on his diet and exercise, Zak is also preparing to marry his partner Kendra Scott after a whirlwind romance.

The Zac Brown Band star went public with his new relationship in May when the couple walked the red carpet at the American Music Awards in Las Vegas and now they are planning a wedding after the musician presented Kendra, 51, with a pink diamond ring.

The happy couple told PEOPLE: "We are so happy and grateful that we found each other."

A source added to the publication: "They were set up by a mutual friend, and are totally in love. They are head over heels and have become inseparable."

The wedding will mark Zac's third trip down the aisle. He was previously married to Shelly Sloan - the mother of his five children - but the union ended in divorce in 2018 after 12 years.