This edited collection explores the intersections of populist communication, performative leadership and international politics. It investigates the mechanisms and dynamics connecting these core conceptual fields and offers empirical examples. Together, the contributors to the volume argue that populist communication, i.e. the language, deliberation and discursive performance of populist ideas, has a profound and lasting impact not only on domestic politics, but in terms of foreign policies as well as the conduct of international politics writ large. First, populist communication shapes how global, regional and transborder issues are debated and strategically used for political purposes domestically. Second, populist communication changes when and how states and other actors in turn formulate responses and policies vis-a-vis, for example, migration, global health, climate change, trade, or war. Finally, populist communication affects the nature of international politics. It influences