NBC

Paget Brewster, who played Joey and then Chandler's girlfriend Kathy, revealed that the cast would always make fun of each other. She said: "If someone made a joke and it didn’t work, they’d all turn on the person and be like: 'You blew it, Lisa!' They would bust each other’s balls. And they started adding this thing into the script that they did to each other in real life: one of them would be talking, and they’d all pretend to fall asleep."