Hilary Thayer Hamann was born and raised in New York. After her parents divorced, she was shuttled between their respective homes in the Hamptons and the Bronx. She attended New York University, where she received a B.F.A. in Film & Television Production and Dramatic Writing from Tisch School of the Arts, an M.A. in Cinema Studies from the Graduate School of Arts and Science, and a Certificate in Anthropological Filmmaking from NYU's Center for Media, Culture, and History.