While Christian involvement in progressive social movements and activism is increasingly recognized, this literature has rarely gone beyond conceptualising religion as a resource to consider instead the ways in which individual activists may articulate their religious identity and how this intersects with the political. Based on ten in-depth interviews with Christian supporters of the London Occupy movement, this study offers an opportunity to respond to this gap by exploring the rich meaning-making processes of these activists. The article suggests that the location of the Occupy camp outside St Paul’s Cathedral was of central importance in bringing the Christian Occupiers’ religio-political identities to the foreground, their Christianity being defined in opposition to that represented by St Paul’s. The article then explores the religio-political meaning-making of the Christian Occupiers and introduces the term ‘activist religiosity’ as a way of understanding how religion and politics were articulated, and enacted, in similar ways. Indeed, religion and politics became considerably entangled and intertwined, rendering theoretical frameworks that conceptualise religion as a resource increasingly inappropriate. The features of this activist religiosity include post-institutional identities, a dislike of categorisation, and, centrally, the notion of ‘doings’—a predominant focus on engaged, active involvement.