Mary Faber (born August 8, 1979) is an American actress. Faber made her Broadway debut on December 26, 2005, replacing Stephanie D'Abruzzo in the musical Avenue Q as Kate Monster and Lucy T. Slut. Starting October 30, 2006, she took a leave of absence from Avenue Q to appear as Clea in the Playwright's Horizon's production of Floyd and Clea Under the Western Sky. Faber returned to Avenue Q on December 19, 2006. Faber's last appearance in Avenue Q was on October 9, 2008. Faber has appeared in off-Broadway shows including Saved! at Playwright's Horizons, Slut, and The Tutor. Faber also previously worked in the Theatreworks musical Junie B. Jones. She helped to develop the character of Natalie in Feeling Electric (which would eventually be redeveloped into the Pulitzer Prize-winning Next to Normal). Faber originated the role of Heather in the musical American Idiot while the show was being developed at Berkeley Repertory Theatre. She continued the role of Heather[4] from the opening of its Broadway run until December 12, 2010. She starred as Smitty in the 2011 revival How to Succeed in Business Without Really Trying alongside Daniel Radcliffe and John Larroquette, from the opening of the run until February 26, 2012. Faber had a recurring role on Parks and Recreation as Pawnee restaurant lobbyist Kathryn Pinewood and has also made guest appearances on Nurse Jackie and The Good Wife. In 2025, she returned to the stage in Bat Boy: The Musical as Lorraine at New York City Center, Off-Broadway. Faber is a graduate of Brandeis University. She married Gabe Witcher, a musician and member of the Punch Brothers, in 2013.