Ozzy Osbourne's son Jack fights a daily battle to keep off alcohol - because he's convinced one drink will send him spiralling back into addiction.

The Adrenaline Junkie star checked into rehab to address his problems with pharmaceutical drugs, marijuana and alcohol as a teenager in 2002.

The 23-year-old is determined to abstain from drinking - but admits he is occasionally tempted to have a beer with his friends.

He says, "It's usually when we've had a really hard day working and everyone's sat down having a beer. It would be nice to unwind with a beer but I know what it would end up like.

"My crew has a tendency to consume ridiculous amounts of alcohol sometimes, so the next day when we have to be up at five in the morning, it's just hilarious to see everyone so hungover."