Image Credit: Screen Rant
Were I to be a casting The Tempest I would choose Ian McKellan for the role of Prospero. I see everything about McKellan in his role as Gandalf to be fitting for my mental image of Prospero, from his flowing beard to rough robes and the staff he walks with. Also, thinking about his role as Gandalf I can’t help but think how Gandalf could change from benevolent mentor to fierce defender of his choices, often keeping other characters in the dark, much as Prospero does Miranda.
