The stars who have overcome addiction - Admitting you have a problem is the first step in fighting it. Lots of stars have spoken of their daily battle against alcohol and drug abuse. Demi Lovato has had her struggles, and recently celebrated six years of sobriety on Twitter.

So we thought we would take a look at some other celebrities who have gotten clean!

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Demi Lovato - The 25-year-old pop singer has had a troublesome past with drug and alcohol dependency and admits that it's a daily struggle to stay clean.

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Demi Lovato - She completed six years of sobriety recently and said on Twitter: "So grateful for another year of joy, health and happiness. It IS possible."

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Daniel Radcliffe - Now eight years sober, the star of 'Harry Potter' revealed that he was abusing alcohol while filming the last film in the 'Harry Potter' series. Because of his alcohol abuse he used to blackout, putting his life at risk.

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Daniel Radcliffe - He told the Telegraph, that he overcame his dependency through exercising and taking up reading again. Speaking about reading, he said: "that was one of the things I found drinking took away from me, bizarrely, as a side effect."

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Robert Downey Jr. - Free of drugs and alcohol for more than 15 years now, RDJ saw his career take off thanks to sobriety and his role in 'Iron Man.'

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Robert Downey Jr. - He told Vanity Fair that his first step was getting out of the 'hole,' and facing life in order to feel stronger.

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Brad Pitt - In 2017, he revealed to GQ that he stopped drinking and was going to therapy. According to him, his separation from Angelina Jolie was the biggest catalyst for change.

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Brad Pitt - He swapped alcohol for cranberry juice and sparkling water. He loved wine and admitted he was 'a professional' when it came to drinking.

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Chrissy Teigen - The model and presenter told Cosmopolitan, that at one stage in her life she was going overboard and couldn't have just one drink.

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Chrissy Teigen - She spoke of going to do hair and makeup with a glass of wine in hand. Before and after important events, she never left the cup behind. But she said the worst thing was making a fool of herself in front of people she respected and the moral hangover that followed the next day.

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Bradley Cooper - The star of 'Silver Linings Playbook' and 'American Sniper' stopped drinking and taking drugs when he was 29.

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Bradley Cooper - He told the The Hollywood Reporter, that he bashed his head on the ground to show how tough he was and ended up spending a night in hospital. He says sobriety helps him keep focused.

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Elton John - Elton has been sober for 25 years, after fighting cocaine addiction in the 80s. He said his addiction distanced him from people and he felt alone.

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Elton John - He told NPR, that he understood if he wanted to stay alive he would need to get help. And that's just what he did.

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Kristin Davis - Known for her role as Charlotte in 'Sex and the City,' the actress surprised everybody when she revealed her alcohol problems. The 53-year-old actress has been clean and sober since she was 20.

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Kristin Davis - Kristin recognized the first signs of alcoholism from her experience with her family, and managed to stop. She told Health that she believes alcoholism is a disease.

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Zac Efron - Efron has also had his battles with drugs and alcohol. In 2013 the star went to rehab and has been sober ever since.

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Zac Efron - He told The Hollywood Reporter, that the decision was for the good of his health and career. "I think it's changed my life. I'm much more comfortable in my own skin. Things are so much easier now."

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Miley Cyrus - Remember that time a demon inhabited Miley's body for a few years? Well she's given up drinking and smoking weed.

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Miley Cyrus - According to Radar Online, a source close to the star confirmed she has been sober for months. Love helps too, right?

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Tobey Maguire - 'Spider-Man' gave up drinking and using drugs when he was 19. Now aged 42, the actor has been sober for two decades.

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Tobey Maguire - His secret? Maguire started going to Alcoholics Anonymous. "You do what they ask you to do and (stuff) happens. Your life gets better. Your life changes," he told People.

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Jada Pinkett Smith - The singer and actress admitted to having problems with drugs when she was young. To make things worse, her mother also had problems with substance abuse.

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Jada Pinkett Smith - Now married to Will Smith, she feared she wouldn't make it to her 21st birthday, according to the LA Times. Thankfully she got over her problem and now lives a happy family life.

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Gerard Butler - The Hollywood hunk realized that his alcohol abuse was effecting his life to the point of 'not caring if he died,' according to Radar Online.

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Gerard Butler - The Scottish actor confirmed that one or two drinks were never enough for him and he couldn't imagine going out without a drink. "As time goes on, you lose the urge and the insecurity that often makes people drink in the first place.”

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Ewan McGregor - Another Scottish actor, Ewan has been sober for 15 years according to The Times. He revealed that he didn't go straight to Alcoholics Anonymous for help.

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Ewan McGregor - Speaking about his recovery, he said that he wad a therapist who specialized in alcoholism, which helped him stop. He says his life is better bow.

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Russell Brand - Brand celebrated ten years sober in a post on his Facebook profile.

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Russell Brand - The comedian and writer thanked his followers for their messages of support and love and said that: "Anybody can get clean. One day at a time."

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