The presentation will discuss theories and methodologies that can be useful to explore the representation of audiences in the European institutional communication (i.e. communication of institutions such as the European Commission, the European Parliament and the European Council), notably on social media platforms. In doing so, it will propose a conceptual and practical approach to studying audiences making different disciplines interact, such as linguistics, rhetoric and argumentative studies, communication and media research but also political science. The concept of audience is indeed a “boundary concept” (Esquenazi, 2009) and as such may benefit from a fruitful dialogue between these different disciplinary approaches. A common tie that...