An effective tagline for a movie about Dr. Jekyll and Mr. Hyde is "Malevolence hides inside".
What is a tagline?
A tagline is a short but memorable phrase that describes the essence of a person or product. In the case of movie taglines, it is expected the tagline is directly related to the theme or the main topic in the movie.
What is ane effective tagline for a Dr- Jekyll and Mr. Hyde movie?
Considering this movie is related to the duality of human nature (good vs evil) one effective tagline is "Malevolence hides inside" because this is a memorable or catchy phrase that describes the main point of the movie.
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