September 23, 2014 11:08 AM EDT

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.

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Write to Eliana Dockterman at eliana.dockterman@time.com.

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