The film is based on a Stephen King short story called "Rita Hayworth and Shawshank Redemption," which was published in the book Different Seasons. Other stories in that collection included the stories later made into the films Stand By Me and Apt Pupil.

It may have had a lackluster opening week at the box office, but 20 years after its release, The Shawshank Redemption tops many critics and movie buffs' best-of lists. Here are 10 things you never knew about the production of the movie.