I Love Lucy star Lucille Ball was beloved around the world when she died unexpectedly.

Named one of TIME’s most influential women of the 20th century, the actress’ impact on the entertainment industry is still felt today. During its six-year run, I Love Lucy made history with its live audience and storylines. A trailblazer in comedy, Ball redefined the role of a television housewife as one who could be relatable and imperfect while still being the funniest person in the room.

Off-screen, she championed her husband, fellow actor Desi Arnaz, refusing to accept I Love Lucy without him as her costar. Ball eventually took over Desilu Studios — her production company with Arnaz — after their divorce. She became the first woman to lead a Hollywood studio, producing the original Star Trek and Mission: Impossible television shows.

Speaking to PEOPLE in February 1980, Ball pondered her legacy. “I don’t think you should write a book until you tell the absolute truth,” she said. “You can’t do that until you’re 85, and I don’t want to live that long. I’ve always prided myself on knowing when to get off and I hope it works out that way.”