Cultural events and festivals can have a significant and important influence on the development of local communities. Their utilization of the endogenous resources of an area means that these events, most often, have a positive impact on the local economy. Quite consequentially, they may also extend the socio-cultural opportunities of local citizens. However, their utilization of time and space does raise concerns regarding environmental impact. Therefore, it is imperative that stakeholders study their net impact on a region. This present paper examines the economic, socio-cultural, and environmental impact of the Transilvania International Film Festival (TIFF). With a history of 15 editions, the festival gathers, year by year, an increasing number of people in Cluj-Napoca. The growth of the event has had unmistakable and important effects on the city. The purpose of the paper is to analyze resident participants' perceptions on economic, socio-cultural, and environmental effects. To reach this goal, an exploratory and descriptive research was conducted. Both primary and secondary data were used in the analysis, the questionnaire being the main tool used for collecting data about participants' perceptions. The results emphasize the positive effects at the socio-cultural level. The festival provides multiple possibilities to spend free time in a pleasant way, it sustains the development of cultural life, and it improves the educational and the cultural level of community. Moreover, the festival does not influence, in a negative manner, the moral principles of the society and it does not generate an increase in crime rate. From the economic point of view, the festival has the capacity to attract investments and additional revenues for the local government, it sustains the development of the city infrastructure, and it creates opportunities for residents to develop new economic activities. Lastly, from the environmental point of view, the festival sustains the improvement of environmental issues, it does not generate important traffic problems, and it does not deteriorate touristic resources.