Jason Isaacs is addressing his battle with addiction.

Isaacs, who played Lucius Malfoy in the “Harry Potter” films, tells The Big Issue in a Letter to My Younger Self: “I’ve always had an addictive personality and by the age of 16 I’d already passed through drink and was getting started on a decades-long love affair with drugs.

“Every action was filtered through a burning need I had for being as far from a conscious, thinking, feeling person as possible. No message would get through for nearly 20 years.”

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He details the first time he got drunk at age 12.

“The barman, who we thought at the time was a hero and I now realize belonged in prison, sneaked us a full bottle of Southern Comfort,” the star shares. “We drank the entire thing in the toilet, then staggered out into the party, reeling around farcically. I vomited, fell on and pulled down a giant curtain, snogged a girl, God bless her… ran out into the street, vomited again, tripped, smashed my head open on the pavement, and gushed blood all over my clothes.

“The next morning, I woke up with a splitting headache, stinking of puke with a huge scab and the memory of having utterly shamed myself. All I could think was… I cannot f**king wait to do that again. Why? I’ve no idea. Genes? Nurture? Star sign? I just know I chased the sheer ecstatic joy I felt that night for another 20 years with increasingly dire consequences.”

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Isaacs continues, “I think what would surprise the 16-year-old me is that I’m okay. That I manage to find simple happiness in simple things. Not always, not perfectly, but enough.

“I thought I was broken. I remember there being a moment, not long before I got clean, when it suddenly occurred to me that if everybody I knew died, literally every single person, I probably wouldn’t mind that much. In fact, I might like it, because then it would be an excuse to sit in a room by myself and take drugs and everybody else would say, Well you know, fair enough, you heard what happened didn’t you?

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