Matthew Perry has opened up about the "scary" moment Friends co-star Jennifer Aniston confronted him about his drinking.
The 53-year-old actor - who starred as Chandler Bing in the beloved US sitcom - recently sat down for an interview with ABC's Diane Sawyer, which is set to air on October 28.
In a newly released trailer for the episode, Perry talks about his struggles with addiction, revealing that - at one point in his life - he was taking "55 Vicodin a day".
Sawyer adds that Perry was also taking "Methadone, Xanax, a full quart of vodka a day" - details that Perry reveals in his upcoming memoir Friends, Lovers and the Big Terrible Thing (also set to be released on October 28).
In the first-look at the interview, Perry also recalls the moment his Friends co-star, Aniston, confronted him about his alcohol addiction.
Perry says that Aniston - who he affectionately refers to as "Jenny" - approached him and said: "We know you're drinking" (with the "we" believed to be the other four main cast members of the show).
"Imagine how scary a moment that was," Perry tells Sawyer. "She was the one that reached out the most [...] I'm really grateful to her for that."
The trailer for the interview also reveals that Perry believes he "should be dead". Addressing why he has opted to open up about his addiction like never before, Perry tells Sawyer: "Secrets kill you [...] Secrets kill people like me."
In another moment from the trailer, Sawyer tells Perry that at the height of his fame, he was starring in the number one movie (The Whole Nine Yards) and the number one show on TV - to which, Perry tells her:
"At the time I should have been the toast of the town [...] I was in a dark room meeting nothing but drug dealers and completely alone."
Of course, this is not the first time the Friends star has shared his battles with addiction.
In 2003, the cast of Friends sat down with Oprah Winfrey to discuss the hit show.
"Matthew went through a life crisis and really inspired a whole lot of people, actually, when you revealed your addiction," Winfrey said.
However, after the popular host applauded Perry's courage for sharing his story, he told her: "It actually has very little to do with courage, at first, it's kinda a life-or-death kinda situation.
"So, what saved me was finally getting a little bit of clarity in my life and realizing that 'this was it, if I keep living my life this way, there isn't going to be any life.'"
Friends star Lisa Kudrow has previously opened up about the pressures Perry's addiction put on his co-stars, telling the NY Times back in 2002: "When Matthew was sick, it was not fun. We were just hopelessly standing on the sidelines.
We were hurting a lot.
"Matthew is one of the funniest people I’ve ever met in my life. He’s charming and hilarious. Most of our hard laughs came from Matthew."