. >> reporter: maggie wheeler. that iconic janice laugh.ipted. >> in the first scene that i shot with matthew we were rehearsing and i thought, this guy is hilarious, what am i going to do? he's going to crack me up. i better come up with a laugh, this character has to be able to laugh or i'm never going to make it through the scene. that's when i looked at him and went, ha ha, no, that's okay. >> reporter: gunther's legendary platinum hair-do. james michael tyler explains. >> this is probably the best happy accident and mistake i ever made in my entire life. the evening before i went on as an extra for the first episode of "friends," a friend of mine said, hey, let me bleach your hair, i'm trying to practice. oh, go ahead, that's fine. so i went in with the white hair. and i had to keep it for ten years because the producers loved it. but you know what, i don't know if there would have been a gunther unless he had that look. >> reporter: "friends" fans can celebrate 25 years of the show inside a recreated central perk. and treat themselves