Jack Osbourne has told how he checked into rehab aged 17 after taking "a lot of pills, a lot of alcohol, and a lot of weed" during his younger years - and he hasn't once relapsed since.

Speaking on TV show I'm A Celebrity... Get Me Out Of Here!, he said: "When you give a 16 year old a s*** ton of money and no rules, in LA, you're kind of just like, 'OK, let's go play.'

"I got sober when I was 17."

Asked by fellow campmate Ruby Wax what he was doing at the time, he said: "A lot of pills, a lot of alcohol, a lot of weed."

Quizzed on whether he went anywhere to recover, he said: "It was an adolescent treatment centre in California."

Asked if he ever relapsed, he said: "No."

Jack also admitted the "result of filming" The Osbournes - which ran for four seasons, from 2002 to 2005 - "bothered" him, because he was "pretty shy".

He added: "The filming never really bothered me, it was the result of filming that bothered me. The huge amount of attention.

"I was always pretty shy.

"They were only supposed to film us for three weeks for a pilot but ended up staying for like four years.

"Being watched was really odd.

"There was not a lot of structure and too much abundance and freedom."

Earlier this week, Jack broke down in tears on I'm A Celebrity as he opened up about his dad Ozzy Osbourne's death, after the Black Sabbath frontman passed away in July, aged 76.

Jack said: "It was definitely a shock.

"I mean, we knew he was sick for a while but it was definitely a shock. I mean, we didn't know it would be that quick.

"It was the ultimate mic drop, he did a massive big gig and was like, alright I'm done."