After Jennifer Aniston made some damning comments about a guest star on Friends, the accused individual has stepped forward.Friends is one of the greatest sit-coms of all time and even if you aren't a fan, you've definitely heard of it.Friends is one of the most famous shows of all time. Credit: Warner Bros. Television/Getty ImagesThe show ran from the 90s to the early 2000s but it's still alive and well as people flock back to rewatch it each year.During the show, there were many people who appeared in a few episodes and went on to become huge stars.Brad Pitt and Paul Rudd come to mind.But not every guest star appeared to get on well with the cast.During an interview with Howard Stern, Jennifer Aniston recounted an instance where one actor displayed a less-than-enthusiastic attitude about his brief stint on the show.Not every guest star was a joy. Credit: Warner Bros. Television/Getty ImagesRecalling the experience, Aniston explained: “And I remember when we were doing a network run-through, the network and the producers would just laugh. And this person would be like, ‘Listen to them, just laughing at their own jokes. So stupid, not even funny.’”Aniston was shocked by the guest star’s behavior, saying: “It was just like, ‘What are you doing here? Your attitude, this is not what we’re all about. This is a wonderful, warm place to be, and you’re coming into our home and just s*** on it.’”Though the actor later apologized, admitting he had been "so nervous" at the time, Aniston chose not to disclose his identity during the interview.Since then, actor Fisher Stevens, who guest-starred in Friends as Phoebe’s psychiatrist boyfriend Roger in season one, has stepped forward to admit that he was the "rude" guest actor Aniston referenced.Appearing on PeopleTV’s Couch Surfing, Stevens reflected on his behavior during the Friends episode, acknowledging that he didn’t approach the role with the right attitude.“At that moment in my career, I had never done a sitcom before,” Stevens admitted. “I had never heard of Friends because it was just the beginning of the show, and I didn’t watch TV at the time much.”