"You had an audience," she explains. "Every actor who was a film actor who came onto our show, they were terrified. It was like, 'Who are these people laughing at what I’m saying?'"
Tom Selleck, a notable Friends guest star, confirmed that he was nervous to appear on the series, but for a different reason than Aniston noted.
"[It's] really hard to come on a show where everybody's up to speed," Selleck said during an April appearance on The Kelly Clarkson Show. "... I was scared to death [on Friends]. I had done Taxi a long time before, but I hadn't done a sitcom. And so, I was really nervous."
"Courteney helped a lot. Courteney's a big help," Selleck added of his frequent Friends screen partner, Courteney Cox. "But that group's an incredible group of friends. They obviously became friends in life as well as on the show. And it shows. It was a wonderful place to work."
During her "Actors on Actors" chat, Aniston also reflects on the recent reunion, noting that she and the other series' stars didn't expect "it to sucker punch us as hard as it did in the emotional gut."
"We just had the idea this is going to be so fun -- we’re going back to the sets exactly the way they were. And literally, every single nook on a shelf was the same. It was so creepy," she says. "But each and every one of us, we walked in, it was just like, 'Oh!' [It was like] time travel."
"It was '04 when it ended. And we were different. We were so little. Our lives were ahead of us," Aniston continues. "And so much has changed. We kind of had rose-colored glasses going into [the reunion]. And then, it was like, 'This is really a lot heavier than I thought.'"
Despite the heavy emotions the reunion brought up, Aniston tells Stan that she "wouldn’t change a lick of it."
"Every time we all get together, it’s just like no time has passed. We basically grew up together, and taught each other a lot," she shares. "We’re each other’s fall guy because the world was happening. We were exploding, and that kind of notoriety was sudden. And we were in these four walls doing the show, and this insanity is happening. And thank God we had each other, because we really couldn’t talk about it outside. It was before social media, so we still had some sanity."