TV sitcom ‘Extended Family’ inspired by real-life relationship of Celtics owner, wife and her ex

Emilia Fazzalari, left, and Wyc Grousbeck watch an NBA basketball game between the Celtics and the Miami Heat on Nov. 30, 2022, in Boston. (Brian Snyder/Pool Photo via AP, File)

This image provided by NBC shows Jon Cryer, as Jim, left, and Abigail Spencer, as Julia, in a scene from the television series “Extended Family.” (Ron Batzdorff/NBC via AP)

BOSTON — When Boston Celtics owner Wyc Grousbeck felt like his life could be the premise for a television sitcom, he knew just where to turn: His friend Tom Werner, a Red Sox owner and TV veteran who was behind megahits like “The Cosby Show,” “Roseanne” and “That ’70s Show.”