Finn's look started out "pretty bland, like the nerdy character Brad is," says costume designer Lou Eyrich. But once Cory Monteith put on the black-rimmed glasses and got a side part in his hair, he transformed. "Cory's just a big goofy nerd and so is Brad," says Colfer. "He was perfect."
Photo Credits: Gregg DeGuire/Getty Images; Jason LaVeris, FilmMagic; NBC, Chris Haston / NBC; Chris Haston/NBCU Photo Bank/Getty Images; Vivian Zink/Getty Images; Bill Records/NBC via Getty Images; Gilbert Carrasquillo, FilmMagic; Michael Lavine/FOX; Laurie Sparham/Netflix; Gene Page/AMC; Giovanni Rufino, ABC via Getty Images; Richard Cartwright/ABC via Getty Images