Whether you can quote every episode or you've sporadically enjoyed re-runs on the TV, Friends is undoubtedly one of the most popular - and beloved - sitcoms in the world. The show, which started in 1994 and ran for a decade, launched the careers of Jennifer Aniston, Courteney Cox, David Schwimmer, Matt LeBlanc, Lisa Kudrow and the late Matthew Perry.
And while the cast has remained real friends since the show ended, Lisa Kudrow has opened up about what it took to build solid, healthy relationships with one another in real life.
