Harmony grew up in the Hudson Valley, where she began acting at the age of 11. She received her BA in Performing Arts from the University of New Hampshire. She then lived abroad in Prague, where she taught English and developed life-long wanderlust. Her solo show, Human Fruit Bowl, written for Harmony by playwright, Andrea Kuchlewska, has taken her around the world to Prague, Amsterdam, Hong Kong and New Zealand. She is a graduate from the Maggie Flanigan Studios and a proud member of Actors' Equity. Victorian Ditmas Park, in Brooklyn, has been her home base for almost a decade. She lives there with her painter husband.

I had the fortune of directing Harmony’s solo show and she inspired me every day with her imagination, thoughtfulness, and work ethic. Harmony is a deeply intelligent, generous and fearless talent who I hope to collaborate with again and again. If I had a theatre that had a resident company of actors she’d be the first one I’d call to ask to be a part of it. Harmony Stempel = The Real Deal
— Director, Jessi D. Hill
I met Harmony while preparing my play “Villa” at PlayCompany in New York City. I loved working with her because she immediately understood my working process as if we had been part of the same theater company for years. She was not only a great, proficient actress but also someone who engaged with the ideas in the play and dove deeply into the complications of the creative process. Harmony is an actress of deep emotions, with a bright musician’s sensibility, who is also very generous. Her sense of joy and love for the theater is a big part of her wonderful presence onstage.
— Playwright & Director, Guillermo Calderón