It is quite likely that your film was reviewed when it was first released in the movie theaters. To locate reviews that may have appeared in newspapers and magazines, try using one of the library database.
In all EBSCO databases (Academic Search Premier, Communication & Mass Media Complete, and Film & Television Literature Index with Full Text) you can search for the title of your movie as general keyword and then select the document type limit Film Review.
You can explore the Internet to find other film reviews. Some suggestions are available here: