Mackenzie Phillips said her One Day at a Time costar Richard Masur wasn’t very nice during season 1, but the two later made peace after Masur apologized. The broader cast, including Valerie Bertinelli, recalled Norman Lear as a loving yet intimidating mentor, and Masur left the show after the first season.

Entertainment· Sep 12, 2026

Facts from Wikidata (CC0). Image by Greg Hernandez via Wikimedia Commons (CC BY 2.0).

Mackenzie Phillips

American actress and singer

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Mackenzie Phillips· Entertainment · 8 sources · Sep 12, 2026Story

Mackenzie Phillips Recalls Tensions With Costar Richard Masur

Entertainment· Sep 12, 2026

Facts from Wikidata (CC0). Image by Greg Hernandez via Wikimedia Commons (CC BY 2.0).

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About Mackenzie Phillips

Laura Mackenzie Phillips is an American actress and singer. She is the daughter of seminal folk-rock musician John Phillips of The Mamas and the Papas and his first wife Susan Adams. Her best-known roles include Carol Morrison in the film American Graffiti, Julie Laura Cooper Horvath on the sitcom One Day at a Time, Molly Phillips on Disney Channel's supernatural series So Weird, and Barbara "Barb" Denning in Orange Is the New Black.

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