These celebs are wicked smart. Welcome to WatchMojo, and today we’re counting down our picks for the brainiest stars of all time. Our countdown of the smartest celebrities ever includes Kate Beckinsale, Emma Watson, Conan O’Brien, Quentin Tarantino, Rowan Atkinson, and more! Which brainy celeb do you think is the most impressive? Let us know in the comments below.

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