Jennifer Barnhart (born March 11, 1972) is an American actress and puppeteer, with a portfolio of television and theatre performances. 　　In 1996, Barnhart began her puppeteer career performing on Once Upon a Tree performing Mara the Beaver and Mrs. Peeper the Owl. Barnhart 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. 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. Barnhart is a Sesame Street Muppet performer who took over the roles of Mama Bear in 2001 and Gladys the Cow in 2002. 　　Barnhart also worked as a puppeteer in Johnny and the Sprites, a Disney Channel children's show created by her Avenue Q co-star John Tartaglia. 　　As of season 46 of Sesame Street, she performs the role of Zoe, following the retirement of Fran Brill in 2014. 　　She appeared on screen as a puppeteer on Law & Order: SVU in May 2006, episode "Web". In regional theatre, she played the angel in Angels in America (Gallery Players), and Olivia in Twelfth Night and Cassie in Rumors (Connecticut Repertory Theatre). In 2011 she appeared as the police officer Randy Osteen in Tracy Letts's new play "Superior Donuts" at the Arden Theatre in Philadelphia.[8] In 2010, she portrayed a Chicago Police Department Detective, Lorna Diamond, in the Law & Order: SVU episode, "Behave".