His publicist JoAnn Geffen confirmed his death, with a statement from his family. "On behalf of the entire Cassidy family, it is with great sadness that we announce the passing of our father, our uncle, and our dear brother, David Cassidy. David died surrounded by those he loved, with joy in his heart and free from the pain that had gripped him for so long. Thank you for the abundance and support you have shown him these many years."

He had been hospitalized for several days with organ failure. Cassidy announced his diagnosis with dementia in early 2017. He performed at the B.B. King Blues Club & Grill in New York in March, talking about his dementia, and said his arthritis made playing guitar an ordeal.

With pretty-boy good looks and a long mane of dark hair, Cassidy was every girl's favorite teen crush in the early 1970s and drew screaming crowds at concert appearances.