Although a motion picture is not currently being produced and the show stopped airing nearly 10 years ago, Aniston still daydreams about her character Rachel.
She believes that Rachel and Ross Gellar, David Schwimmer's persona, would be living happily ever after right now.
"They're absolutely, 100 per cent together,'' she said.
"They have more kids! He's probably still working, and hopefully they're still hanging out somewhere. It would be really upsetting if they weren't; it would bum me out.''
Since her departure from Friends, Aniston has starred in numerous films. She is unsure whether she is interested in returning to TV full time.
"I loved what I did for 10 years; it was pure joy and nothing but fun, and it'd be hard to top it,'' she said.
"The way we sort of felt the excitement of what Friends was when it started, it would have to be something where you felt a similar charge. But I'll never ever say never."
Aniston stars opposite her beau Justin Theroux in comedy Wanderlust, which will be released this weekend.
The actress received a star on the Hollywood Walk of Fame on Wednesday. Theroux and her dad supported her at the ceremony.
- AAP