Dame Maggie Smith, a renowned British actress known for her roles in "Harry Potter" and "Downton Abbey," has passed away at the age of 89. Tributes have poured in from fellow actors, including Daniel Radcliffe, Hugh Bonneville, and Rob Lowe, who praised her sharp wit and undeniable talent. Smith's career spanned over 60 years, during which she won two Academy Awards, four Golden Globe Awards, and numerous other accolades. She is remembered for her iconic performances on stage and screen, including her portrayal of Professor Minerva McGonagall in the "Harry Potter" films and Violet Crawley in "Downton Abbey.