Jennifer Aniston has said that she and her co-stars were "so naive" about the emotional impact of taking part in this year's TV special Friends: The Reunion.
The celebration of the beloved 90s sitcom saw the six main cast members head back to the show's original set for a trip down memory lane.
In an interview with the Hollywood Reporter, Aniston was asked about saying that the reunion was harder on her than anticipated.
"Time travel is hard," Aniston replied.
"I think we were just so naive walking into it, thinking, 'How fun is this going to be? They're putting the sets back together, exactly as they were'," she continued.
"Then you get there and it's like, 'Oh right, I hadn't thought about what was going on the last time I was actually here'.
"And it just took me by surprise because it was like, 'Hi, past, remember me? Remember how that sucked? You thought everything was in front of you and life was going to be just gorgeous and then you went through maybe the hardest time in your life?'
"It was all very jarring and, of course, you've got cameras everywhere and I'm already a little emotionally accessible, I guess you could say, so I had to walk out at certain points. I don't know how they cut around it."
When asked how she had envisioned her life and career post-Friends, Aniston replied: "The career was one thing. I didn't know what was coming, and that's been nothing but blessed. It's a different calibre of work but I love it, no matter what, even if it's a terribly reviewed, dumb comedy, it doesn't matter if it brings me joy.
"It was more personal stuff that I had expectations about that sort of shape-shifted, so to speak. That was what was jarring, that we all had an idea of what the future was going to be and we were going to go hunker down and focus on this or that and then it all just changed overnight, and that was it.
"But again, everything's a blessing if you're able to look at life's ups and downs in that way. And if it all hadn't happened, I would not be sitting here the woman that I am."
Aniston received the Sherry Lansing Leadership Award at the Hollywood Reporter's Women in Entertainment event in Los Angeles on Sunday night.