#18: The Golden Girls
Originally, Sophia Petrillo, played by Estelle Getty, wasn’t planned as a primary character on The Golden Girls. Her unforgettable portrayal of Dorothy’s witty mother won the audience’s hearts, making her an indispensable part of the show.

provided by constative.com
Surprisingly, Getty was actually younger than her on-screen daughter, Bea Arthur. To integrate Sophia fully, producers had to make the difficult choice of removing Charles Levin’s character, “Coco,” from the series, marking a notable shift in the show’s dynamic.