This list contains our choice of the 12 most iconic movie heroes that turned out to be the movie's main villains, number 12 being the top pick. If you haven't watched the films from this list, they should be your next choice. Before you continue, however, we must warn you that the descriptions contain massive spoilers!
Gone Girl - Amy Dunne
Even though the plot twist happens fairly early in the movie, it still made it to our list as one of the most unexpected "hero-gone-villain" moments. Amy Dunne, who was the national sweetheart and author of children's books, went missing and her husband Nick is desperately trying to find her. We find out very soon that Amy meticulously staged her death and framed Nick while she started a new life, taking revenge for her "wasted years."