Populism in Central-Eastern Europe and South-Eastern Europe has been framed through theoretical ideas and expectations based on West European experience. However, the region’s experience of populist politics has diverged from that of Western Europe in important ways. In older West European democracies, the most typical vehicle for populism are, for the moment, new or previously marginal illiberal challenger parties which confront an essentially liberal, non-populist mainstream. In Central-Eastern Europe and South-Eastern Europe, it is the “mainstream” which is or has become populist. Therefore, it is important to elaborate which of these universal indicators of populism can be applied to the countries of Central and Eastern Europe and Western Balkans, and what kind of particularities will crystallize as a consequence of the socialist background. The main aim of the conference is to gather scholars that are researching different aspects and manifestations of populism in the region. This conference is organized in the framework of POPREBEL project, which has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 822682