14) Meryl Streep as Minerva McGonagall

Maggie Smith will remain unforgettable for this iconic role. Stern, fair and occasionally kind. The Transfiguration professor had a key role in the entire franchise and no doubt in the movies we will get to see a lot of her. Meryl Streep's contribution in movies is just undeniably great and she can bring that strict professor vibe throughout the series. The showdowns with Umbridge or Snape would look really good with her. Also, the competitive attitude of McGonagall when it came to winning the House Cup should be a piece of cake for this actor.
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Edited by Priscillah Mueni