This paper sets out to demystify the nature of Nollywood movies existing in diversity and to propose new dimensions for using film to achieve behaviour change and a dependable national security in Nigeria. The paper views national security as the art of ensuring national safety of the government. Nollywood has naturally diversified along ethnic dimensions including the Hausa movies (Kannywood) in the North, the Yoruba movies in the West and the Ibo movies in the Eastern part of the Nigeria. Others (...) include the Akwa-Cross movies from the Southern part and the Tiv movies from the Middle Belt region of Nigeria. The paper adopts observation and analytical research methods depending on secondary sources. The paper finds out and concludes that Nollywood’s diversity is an opportunity to ameliorate some security challenges of the country and recommends the use of behaviour change focused themes which should be featured by Nollywood movie producers in Nigerian films produced along cultural, ethnic and regional boundaries. (shrink)