With the development of technology, the emergence of new media and the more accessible content, watching a film today is one of the most common activities in a free time. The film represents the medium of modern society and the cultural medium that builds the identity of an individual. Libraries have recognized the importance of films and included them in their collections since the appearance of VHS format. This master’s thesis will analyse the theme of film diversity in public libraries. Given that films from the Internet movie database (IMDb) list are mainly Hollywood films, this research will answer whether such films are available in the Croatian public libraries. The checklist method was used. The catalogs of selected libraries were browsed and compared with the list of 250 best films according to one of the most famous and greatest web sites for films – IMDb. The aim of the paper is to examine the extent to which the highest ranked films by the viewers, according to the IMDb, are represented in the collections of the Public library of Rijeka, Public library of Marko Marulić in Split and the Zagreb public libraries. The purpose of the paper is to emphasize the importance of strengthening the diversity of film collections. This research will gain insight into the availability and diversity of the films in the major Croatian public libraries in relation to the established IMDb list of the best-rated films and with regard to the type of film, country of origin, year of creation and film genre.