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The Happiest Millionaire is a Sherman brothers' film. The Sherman brothers, Richard M. Sherman and Robert B. Sherman, were a songwriting and composing duo known for their work on numerous Disney films, including The Happiest Millionaire. They wrote the film's songs, including the Oscar-nominated "Fortuosity," and composed the film's score. The Happiest Millionaire is a musical comedy film based on the 1956 play of the same name by Kyle Crichton.