Surprising Stories from the Set of One Day at a Time

Years later, Mackenzie Phillips admitted she barely remembers portions of filming during the height of her addiction. In interviews and her memoir, she described being so deep into substance abuse that parts of her time on set feel like a blur.

It’s a sobering hindsight detail. While audiences watched Julie navigate teenage drama, Phillips herself was struggling to function. The performances were real — but so was the chaos happening just outside the frame.