Dame Maggie Smith, the acclaimed British actress who won an Oscar for her unforgettable performance in "The Prime of Miss Jean Brodie" and captured the hearts of a new generation as the sharp-witted Dowager Countess of Grantham in "Downton Abbey," has died at the age of 89, her publicist confirmed Friday.

Smith, celebrated as one of the preeminent actresses of her era alongside luminaries like Vanessa Redgrave and Judi Dench, leaves behind a remarkable legacy spanning more than six decades in film, television, and theater.

Smith's portrayal of the fiercely independent schoolteacher Jean Brodie in the 1969 film earned her the Academy Award for Best Actress, as well as a British Academy of Film and Television Arts (BAFTA) award the same year, cementing her status as a leading talent in British cinema. She continued her winning streak nearly a decade later, taking home the Oscar for Best Supporting Actress for her role in the 1978 comedy "California Suite."

FILE - British actress Dame Maggie Smith poses in London on Dec. 16, 2015. Smith is celebrated as one of the preeminent actresses of her era alongside luminaries like Vanessa Redgrave and Judi Dench. FILE - British actress Dame Maggie Smith poses in London on Dec. 16, 2015. Smith is celebrated as one of the preeminent actresses of her era alongside luminaries like Vanessa Redgrave and Judi Dench. Kirsty Wigglesworth/AP

Known for her intelligence, commanding presence, and extraordinary range, Smith remained a beloved figure in the entertainment world. From her early days in British theater to her celebrated roles on the global stage, she was a versatile talent who continually redefined herself across genres and generations.

Her death marks the end of an era for British acting, with her work cherished by audiences both young and old, ensuring her indelible mark on the arts will be remembered for years to come.

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