The progression of movie-making is never set in stone. There are plenty of variables that move left and right, leaving the producers and directors scrambling to get things right. And while some problems may be avoided with careful planning, there are times when changes are sudden, but for the better. One of such cases would be a change in actors. Maybe they can't play the role or ultimately become unfit for the overall vision, but they are removed from the production and the role is given to someone else. And the replacement actors become the embodiment of the characters we know now.

Stuart Townsend, a relatively new name in the industry, was cast as Aragorn in Lord of the Rings, but when the filming began, he lasted only a few days. The director was quick to notice Townsend was too young

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