Helen Henny is a chicken who sings and plays tambourine for Munch's Make Believe Band. She's a sporty girl, and enjoys cheerleading and playing video games. Her friends mean more to her than anything else in the world, and she's always the first to say hello to a new arrival. She also has a not-so-secret crush on Chuck E., though he tends to be too shy to acknowledge it. (She was not originally portrayed this way, of course, but this is how she has been depicted in most media made for the past couple of decades.)
When she was originally installed as a guest character in 1978, Helen was voiced by actress and singer Paula Mulcahy-Keane. Paula would voice her in most of her Pizza Time Theater appearances until 1986, when the voice recording for the showtapes was moved to Texas; at this juncture, then-local actress Nancy Lenihan took over. In 1991, Helen's personality was slightly reworked, and she was recast to accommodate this. Karlisa McKinney Burleson, who was working behind the scenes at CEC to choreograph the live-action segments of the showtapes, took it upon herself to provide the new voice. She did both the speaking and singing for her throughout 1991, but recording artist Annagrey LaBasse was brought in in May of 1992 to handle her singing vocals. When the characters were all recast in 1994, FUNimation mainstay Stephanie Nadolny took over as Helen. She maintained the role until near the end of 1995, when her speaking voice was again recast for the Disney-produced shows. Her speaking voice for these shows is still unidentified, but her singing voice here was performed by New York session singer and Olympic skater Cathy Turner. The role was given back to Karlisa and Annagrey in August of 1996 when the new voices were dropped. Karlisa dropped out after April of 2000, so the role was given to Annagrey full-time. Meanwhile, for the 1999 movie Chuck E. Cheese in the Galaxy 5000, Helen's speaking voice was performed by local actress Georgia Denney. Georgia did most of her singing for the film, but a singer named Heather Garner sang her solo on "The Real Me" in her stead. Annagrey would go on to voice Helen in every showtape from July 2000 to February 2016, when another recording artist, Caroline Richardson, took over. Caroline continues to voice her to this day.