You undoubtedly know their names and faces: Andrew Rannells plays Lena Dunham’s’ gay confidante Elijah in HBO’s Girls. Christian Borle played the depressive composer Tom Levitt on NBC’s Smash. But they’re creatures of the theater: Rannells was Tony-nominated for his breakout performance as Elder Price in The Book Of Mormon; Borle recently vamped as a preening sequined Shakespeare in Something Rotten!, for which he won the second of his two Tony Awards.