[4] Although her mother never thought Franz would succeed as an actress, she wanted to attend the American Academy of Dramatic Arts (AADA) and worked as a secretary at Ohio Edison to save enough money to enroll there.
She has starred in numerous Off-Broadway and regional theater productions, including the American premiere of Frank McGuinness's Bird Sanctuary.
She also appeared in Long Day's Journey into Night, The Glass Menagerie, The Comedy of Errors, Madwoman of Chaillot, The Lion in Winter, A View from the Bridge, The Matchmaker, The Wizard of Oz, Great Expectations, The Model Apartment, and Woman in Mind.
Her "subtly layered performance" as Grandma Kurnitz in the 2017 Weston Playhouse Theatre Company production of Neil Simon's Lost in Yonkers was duly noted by Rutland Herald critic Jim Lowe, who deemed Franz's portrayal the "dramatic backbone" of the production, "allowing only traces of the octogenarian's love and humanity to seep through.
She has appeared in such feature films and motion pictures as Sabrina, Christmas with the Kranks, The Substance of Fire, The Pallbearer, Thinner, The Secret of My Success, School Ties and Jacknife.