Mackenzie Phillips Struggled to Get Along With This 'One Day at a Time' Costar

One Day at a Time alum Mackenzie Phillips had a rocky relationship with one of her castmates on the 1970s sitcom. “Richard Masur wasn’t very nice,” Phillips, 66, told former costar Valerie Bertinelli on the Monday, Septe

Published: September 14, 2026 at 06:57AM on Source: ALPHA MAG

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