You'll find lots of helpful information about finding criticism and articles in the course guide ENG 100(Composition) developed for this course. Selected links from the course guide are below.
Here are some steps to get started: try searching the internet for film reviews.
For scholarly databases, try Proquest and Academic Search Premier first. Start off by limiting your search results by checking off the box for scholarly (peer-reviewed) articles.
Since your movie is also a book title, you may want to include the word movie or motion picture in your search string.