Jennifer Barnhart is a veteran puppeteer who inherited the roles of Gladys the Cow and Mama Bear on Sesame Street. She has also taken over performing Zoe starting with season 46, following Fran Brill's retirement, and performs the Galli Galli Sim Sim character Raya for the "Cleaner, Healthier, Happier" campaign.
Barnhart, who received her BFA in puppetry from The University of Connecticut's Puppet Arts Program, began her puppetry career working on the Animal Planet series "Once Upon a Tree" and subsequently played Cleo the Lion on Between the Lions, before joining the cast of Sesame Street. She also performed on John Tartaglia's Johnny and the Sprites.
Barnhart was the longest running member of the original Broadway cast of Avenue Q, portraying her original roles of Mrs. Thistletwat and all-purpose assistant, and understudying the roles of Kate Monster and Lucy T. Slut, for the show's entire six-year run. She briefly returned to her former roles in an Off-Broadway production of Avenue Q in 2013 and has consulted for regional productions of the show.
- Sesame Street: Gladys the Cow, Mama Bear, Zoe (2016-present), Rosalyn, Karina the Ballerina, Ming, Granny Snuffle, Super Chicken, Yo-Yo (voice only), Mommy Snuffleupagus, Goldilocks (2005), Taylor, Sue Sylvester parody, "Dinner Theatre" Magenta cousin (from "Annie Get Your Gumbo"), Cameo as a mom (episode 4091)
- Bear in the Big Blue House: Ms. Maxwell
- Sesame Beginnings: Make Music Together
- Happy Healthy Monsters
- Math Is Everywhere
- Kinect Sesame Street TV: Gladys the Cow, The Letter Tree
- Between the Lions: Cleo Lion, Female Monkeys, Animated Voices
- Lomax, the Hound of Music: Delta