Jack Black is speaking openly about his history with substance abuse.

In an interview with the Herald Sun, the 49-year-old “School of Rock” star spoke about how he personally related to his new film, “Don’t Worry, He Won’t Get Far On Foot”, in which he plays an alcoholic.

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“I have experience in the world of addiction,” Black said. “Alcoholism is in my family, so I know personally what that is about and I myself also struggled.”

He added, “In my wild, younger years I’ve definitely gone down some risky roads and I’m very fortunate to still be alive, to be honest with you. I partied pretty hard, and man, I definitely had a very robust, ridiculous, idiotic period in the ’80s.”

Black has spoken about his teenage drug addiction before, telling Parade magazine in 2016, “I was having a lot of troubles with cocaine… I was hanging out with some pretty rough characters. I was scared to go to school (because) one of them wanted to kill me. I wanted to get out of there.”

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The actor is now sober and has been married since 2006 to artist Tanya Hayden, with whom he has two sons.