In his interview with The New York Times, Matthew Perry admitted that during the time that he was filming Monica and Chandler's wedding on "Friends," he was dealing with some serious struggles in his life. Perry had sought treatment for his substance abuse and after filming the wedding episodes, he was transported directly to rehab to work on his addiction issues. "I married Monica, and got driven back to the treatment center — at the height of my highest point in 'Friends,' the highest point in my career, the iconic moment on the iconic show — in a pickup truck helmed by a sober technician," Perry recalled. 

However, the actor says that he wasn't under the influence during the entire duration of "Friends." In fact, he claims that during the ninth season of the hit series, he was sober the entire time, which ended up paying off after he earned an Emmy nomination for his role as Chandler Bing. "There were years that I was sober during that time. Season 9 was the year that I was sober the whole way through. And guess which season I got nominated for best actor? I was like, 'That should tell me something,'" he told People.