Kristin Davis as Erin
Best known for playing Charlotte on the HBO series “Sex and the City”, Kristin had a cameo on Season 7, Episode 7 “The One with Ross’s Library Book”. Kristin plays Erin, a woman that Joey had a one night stand with that befriends Phoebe and Rachel. Kristin Davis looks back on her time on “Friends” very positively, though she does remember being incredibly nervous of filming in front of a live audience.