In 1996, Barnhart began her puppeteer career performing on Once Upon a Tree performing Mara the Beaver and Mrs. Peeper the Owl.[5] She made her Broadway debut in 2003 and is a featured performer in the Tony Award-winning musical Avenue Q, in which she also appeared Off-Broadway.[6][7] She was a regular puppeteer on the Nickelodeon series Oobi, playing Mrs. Johnson and various incidental characters. She also stars as Cleo on PBS's literacy education series, Between the Lions, and performed the puppetry for Kanga and Owl on Disney Channel's The Book of Pooh.[1][2] She is a Sesame StreetMuppet performer who took over the roles of Mama Bear in 2001 and Gladys the Cow in 2002.[1][2]
As of season 46 of Sesame Street, she performs the role of Zoe, following the retirement of Fran Brill in 2014.
Acting career
She appeared on screen as a puppeteer in the "Web" episode of Law & Order: SVU in May 2006.[2] In regional theatre, she played the angel in Angels in America (Gallery Players), Olivia in Twelfth Night, and Cassie in Rumors (Connecticut Repertory Theatre). In 2011 she appeared as police officer Randy Osteen in Tracy Letts's new play "Superior Donuts" at the Arden Theatre in Philadelphia.[8] In 2010, she portrayed Chicago Police Department detective Lorna Diamond in the Law & Order: SVU episode, "Behave".[2]