ABSTRACT Youth councils, youth parliaments or youth organisations are often referred to as the king’s road to young people’s participation, at least from the point of view of policymakers. At the same time, there is evidence that many young people are either uninformed about or sceptical of institutionalised forms of youth participation as they distrust institutions in general. This article is interested in understanding why some young people actually engage in those institutionalised forms of youth participation that most of their peers assess as being ineffective and irrelevant for their needs and interests. Based on qualitative interviews with young people involved in different forms of participation in the context of a European research project, we take a biographical approach aimed at reconstructing what makes young people interested in getting and staying involved with youth councils, youth parliaments and/or youth organisations. The aim is, on the one hand, to analyse the different biographical pathways that lead young people into formal engagement as youth representatives. On the other hand, this article draws on a reconstructive analysis of the life stories of young people who engage in formal participation to elaborate the key dimensions and constellations that can be reconstructed from their participation biographies.