Maggie Smith as Professor Minerva McGonagall – Then
While Professor Dumbledore was the iconic face of Hogwarts, Deputy Headmistress Professor McGonagall also held a strong and significant presence.
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As a devoted Order of the Phoenix member, Minerva watched over Harry Potter during his initial stay at the Dursleys. She continued to be a steadfast figure throughout his Hogwarts years. She played a pivotal and enduring role in nearly every franchise installment.