My favorite movie of all time is The Shawshank Redemption.
Shawshank Redemption is a very good story of a banker who gets a sentence of life for the murders of his cheating wife and her lover, which he did not commit.
In prison he befriends a smuggler and becomes the assistant of a crooked prison warden.
This movie is in my humble opinion a must see, because it has all of the emotions in it, during the movie you can laugh, cry, get mad and more. I am really trying to not spoil anything as I want that Shawshank experience for the person who has never seen this great movie.