Charlie Sheen's history with substance abuse dates back decades.Sheen, 60, reflected on his addiction journey and the way his famous family organized an intervention in the early '90s in the new Netflix documentary, "aka Charlie Sheen."The "Two and a Half Men" actor recalled receiving an invitation to celebrate his father Martin Sheen's 50th birthday, only to arrive for his own intervention, which included a pep talk from Clint Eastwood.CHARLIE SHEEN FELT RELIEF WHEN DIAGNOSED WITH HIV AFTER YEARS OF WILD, DRUG-FUELED CRAZINESS"I get invited to my dads birthday party," Sheen said in the docuseries, per People magazine."I think Mom called me: Dads got things to do, so we have to do it early. Shes like, Were thinking 9:00. Im like, a.m.? Shes like, Yeah."CHARLIE SHEEN OPENS UP ABOUT SEXUAL ENCOUNTERS WITH MEN FOR THE FIRST TIMEThe "Major League" actor remembered, "She brings me into the house, and Im looking for balloons, a cake, funny hats And as I come around the corner, I see the living room has this really expertly organized circle of people."Sheen said the group was "a weird mix," and included his seventh-grade history teacher, yoga instructor, Rob Lowe, and his siblings.His longtime friend, Sean Penn, did not participate. Penn said in the docuseries that he was "never involved with those interventions" due to his own personal struggles."I was not, you know, walking a perfect trail of my own in some regards," Penn said.LIKE WHAT YOURE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWSSheen remembered staying mostly silent during the "emotional" day, where his friends and family read letters."Theres a lot to process," he said. "Id kind of heard about these things, but never been this close to an intervention." Sheen requested time away from the group to think about going into treatment, but "they said, 'No. This is a decision weve made for you that has to happen today.'"CLICK HERE TO SIGN UP FOR THE ENTERTAINMENT NEWSLETTERHe added, "I was figuring, If I just agree to this, just to get out of this situation, I can probably hatch a plan somewhere away from here.'"Sheen was deep in thought on ways to avoid getting treatment until his dad walked out of his office and said, "Theres someone on the phone who wants to talk to you."The "Platoon" star took the phone expecting a family member, and knew exactly who he was speaking to the second he heard the tone."Its a very recognizable, very globally familiar voice," he said. "Its Clint."He added, "[Clint] said something like, Youve got to get the train back on the tracks, kid Youre worth saving.' It was really powerful. I thanked him, gave the phone back to Dad and said, 'All right, lets go.'"Sheen finally got clean in 2017. "You have to be willing," he told People magazine. "I keep a [mental list] of the worst, most shameful things Ive done, and I can look at that in my head if I feel like having a drink."