Kelly Osbourne’s wild family – physical fights and time Sharon shut her in cell

Dysfunctional was the key word when it came to MTV's hit show, The Osbournes.

With bumbling former addict and Black Sabbath frontman Ozzy Osbourne at the helm, it followed the complicated and often volatile dynamics between his children Kelly and Jack and wife Sharon.

But behind the scenes, the show ran in tandem with the darkest chapter of Kelly's life, with the star - who turns 36 today - gripped by a near-lethal addiction to prescription painkillers.

Despite the family's best efforts and a whopping seven stays in rehab, it took a near tragedy to help Kelly get clean - only for her to swap drugs for food.

"I was so angry about the things people said about me. I truly believe it's the main reason I turned to Vicodin and ended up in rehab. I just hated myself," she told Shape magazine in 2010.

"I replaced the drugs with food and just got fatter and fatter... I'm an emotional eater," continued Kelly, who is now sober and recently lost six stone thanks to a gastric sleeve and a vegan diet.

Here's a look at her most tumultuous family moments and what happened next to those fractious family ties...

When Kelly wasn't brawling with Jack, she was engaged in a constant battle of wills with mum Sharon, 68, over her addiction.

Unbeknown to her family, Kelly first started abusing prescription painkiller Vicodin after being prescribed it for tonsillitis when she was just 13.

At one point, the teenager was popping 50 pills a day and throwing up blood, and later explained her addiction was to blame for the screaming matches she had on the show.

Kelly was rushed to rehab for the first time of many in 2004 and at one point a desperate Sharon resorted to locking her in a padded cell.

“I’ve been to rehab seven times and to two mental institutions," Kelly previously told Cosmopolitan magazine.

"My mum even had me put in a padded cell once to scare me, but like a brat I just sat it out until she said, ‘Well, that’s not going to work.'

“But what I’ve learnt is that no amount of therapy or medication is going to work unless you want it to. Until you want to be a good person, you will never be one.”

However, everything changed when Sharon was diagnosed with colon cancer and an 18 year old Kelly feared she would die.

“I said, ‘F*** you, career, hello, Mother," she continued.

“I became my mum’s nurse 24/7. I gave her injections and medicines when she had seizures. I thought I was going to lose her.”

Kelly and Jack, 34, fought like cat and dog, once coming to blows when Jack danced with her sworn enemy Christina Aguilera at a party.

"When you hate someone, I hate someone," she raged before a full-on brawl ensued and Sharon had to step in.

Another time things turned violent over Jack's refusal to stop throwing parties while their parents were away. Again, it ended with them being prised apart by staff.

It later emerged that Jack was also fighting his own demons and he entered a rehab facility for an addiction to opioid painkiller OxyContin in series two.

He told the camera crew: "I want to be in control of my life. I was really loaded, and I just sat on my mum's bed, and I just said, 'I am going to go pack my bags... I'm ready to go. I want to go; I need to go.'"

Jack did manage to get clean and celebrated 17 years of sobriety last April.

And these days he is extremely close to Kelly, who supported him through his MS diagnosis in 2012 and is proud auntie to his three children with ex-wife Lisa Stelly: Pearl Clementine, seven, Andy Rose, four, and Minnie Theodora, two.

Kelly witnessed first-hand how drugs destroyed her addict father's health.

“There were times when dad wasn’t on drugs and drink, but not often,” she told The Mirror in 2013. “I didn’t really have a dad at all.”

He even warned her as a child: “Don’t do drugs or you’ll end up like me.” But she ignored him.

“Dad instilled in us from a young age we shouldn’t drink or do drugs, or we could end up like him. I was adamant I wouldn’t be like him.

"But I tried Vicodin and felt that feeling. Then things kept getting deeper and darker until I became what I’d promised myself I wouldn’t be – an addict.”

These days the father-daughter pair are incredibly close, with Kelly explaining that his Parkinson's diagnosis has only bonded them further.

Speaking to the Daily Mirror, the former Fashion Police star said: "Everyone is acting like it’s doomsday but it’s not.

"Life happens and everybody gets dealt a different set of cards, and it depends how you play it."

Adding: "We take every day as it comes and he is doing incredible. We couldn’t have got much closer, but we did.

Contrary to popular belief, there aren't just two Osbourne kids - there are three.

While Kelly and Jack were happy to take centre stage, their big sister Aimee wouldn't have a bar of it and moved out of the family home aged just 16 when she found out the cameras were coming.

She also banned her visits from being filmed, and Sharon later admitted the situation put a distance between them.

“I know that my eldest girl couldn’t live in our house because we were filming and it drove her insane," Sharon told her US talk show, The View.

"She felt, too, that she didn’t want to grow up on camera. She hated the idea, it was appalling to her. And so she left at 16 and I regret every day that she did.”

Despite not wanting to be in the spotlight, Aimee is now a singer and actress and recently told NYLON magazine she was simply too young to cope with her life being so exposed.

"It was just not my aspiration. Everywhere you went people wanted to know everything, and that when you’re growing up that can be kind of intimidating," she said.

"The idea of kind of letting it all out there at that point, at around fifteen... Nobody at fifteen wants anybody to see how goofy their parents are."

Aimee and Sharon remain close and are often spotted enjoying girls' shopping trips. But as for her younger siblings, there is no love lost.

"I wouldn't say there is an ease between us," Aimee once said of her strained relationship with Kelly, 35, and Jack, 34.

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