16 Movies That Owe Their Existence To Other Films

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Actors are well-known for inter-marrying and producing offspring. It's the Hollywood way. But as it turns out, movies themselves have a way of breeding, too. New movie ideas are hatched from the bowels of other movies all the time. And we're not just talking about sequels and spinoffs.

There are a ton of movies that owe their existence to other movies. Or at least a Father's Day card.