sentences:  In 2000, Gelber earned a master's degree in acting from New York University's Graduate Acting Program at the Tisch School of the Arts.He is known for originating the role of struggling comedian Brian in the Tony Award-winning Broadway musical "Avenue Q".Gelber also performed on Broadway in Arthur Miller's "All My Sons" as Frank Lubey from 2008 to 2009, and played Buddy in "Elf the Musical" from 2012 to 2013.