Heidi Mollenhauer, a talented singer, started her journey by performing at a local night-bar before being approached by Gary Trousdale and Kirk Wise, the directors of Disney's The Hunchback of Notre Dame, to provide the singing voice for the character Esmeralda in 1996. This marked Heidi's first and only experience in voice acting, a notable milestone in her career.
In addition to her voice acting debut, Heidi also made a self-appearance in the documentary The Making of Disney's 'The Hunchback of Notre Dame' in 1996, alongside Tom Hulce and Demi Moore. After this, Heidi's professional activities seem to have come to a halt, and she has since disappeared from the public eye, ceasing to appear in movies, theatre, and television.