Can you believe how many famous faces appeared on Friends over the years? Whether cameos were made by some of the cast member's then-significant others, like Brad Pitt and David Arquette, or A-listers like Julia Roberts and Reese Witherspoon popped by, the show snagged some amazing guests in big roles. As the show gets ready to celebrate the 25th anniversary of its debut on Sept. 22, let's take a look back and see if you can remember them all!
(P.S. If a few names seem to be missing, don't worry -- we only included celebs who were guest stars rather than had recurring roles, such as Paul Rudd, Tom Selleck and Anna Faris.)