Her company Augusta Films announced the news but did not provide details.
It became the inspiration forLoving,which starred Ruth Negga and Joel Edgerton as the Lovings.
Buirski shared a Stanley Kramer Award from the PGA forLovingin 2017.
Mark Mann
It premiered at Venice last year and went on to play Telluride and many other festivals.
Read Deadlines review of the filmhere.
Within a week after that films Lido debut, Buirskisigned a development dealwith Cineflix Productions.
Her passion for filmmaking is clear in this beautifully crafted story that seamlessly weaves multiple storylines.
Susan Margolin, Buirskis frequent collaborator and producer, said Wednesday: The field has lost a giant today.
Nancy was a completely original thinker and a visionary.
With every film she pushed the limits of the art form with her kaleidoscopic, unique approach to storytelling.
We are devastated by this loss.
