The actress best known for playing Phoebe Buffay says the sitcom was "very progressive" for its time.
The series also stars Lisa Kudrow, John Malkovich, Diana Silvers and Tawny Newsome.
All six original cast members are set to appear in the TV special, which is scheduled to land on HBO Max.
According to Deadline, a deal between the hit show's original cast and HBO is close, with an 'unscripted reunion special' set for HBO's forthcoming streaming platform HBO Max.
Lisa Kudrow almost became known for another very popular 90's sitcom.
Scarily, it’s been over 20 years since the first episode of ‘Friends’ aired and over 10 years since it finished. To find out, we dusted off our office calculator to tot up their box office success (or lack thereof) since the show’s teary finale aired in May 2004. Jen is the clear winner in the Battle of the Friends - the series’ only main castmember to become a bona fide movie star since the end of the show.