The cast includes Courteney Cox as Monica Geller, Jennifer Aniston as Rachel Green, Lisa Kudrow as Phoebe Buffay, Matthew Perry as Chandler Bing, Matt LeBlanc as Joey Tribbiani, and David Schwimmer as Ross Geller, among others.

Source: https://www.comingsoon.net/guides/news/1318381-friends-season-7-where-to-watch-stream-online

Viewers expected each season of the series to encapsulate one year of the lives of the six main characters: Rachel Green, Ross Geller, Monica Geller, Chandler Bing, Phoebe Buffay, and Joey Tribbiani, but this often proved to be inconsistent.

Source: https://screenrant.com/friends-character-ages-change-wrong-explained/