Katherine Helmond

LOS ANGELES — Actress Katherine Helmond, an Emmy-nominated and Golden Globe-winning actress who played two very different matriarchs on the ABC sitcoms “Who’s the Boss?” and “Soap,” has died, her talent agency said Friday. She was 89.

Helmond died of complications from Alzheimer’s disease last Saturday at her home in Los Angeles, APA said in a statement.

She was probably best known for playing Mona Robinson, Judith Light’s mother and Alyssa Milano’s grandmother on “Who’s the Boss?” She won a best supporting Golden Globe for her work in 1989.

Her major break came with “Soap,” a parody of soap operas that ran 1977 to 1981. She played wealthy matriarch Jessica Tate.