The increasing prevalence of body dissatisfaction among young people is now well recognised with much of the existing literature making connections between media imagery and body dissatisfaction. Media literacy-based interventions continue to be rolled out in schools across the global north in an attempt to prevent body dissatisfaction. However, the pervasiveness of digital media in young people’s lives has prompted questions about the adequacy of current theories of media literacy and associated school-based interventions. We explore how feminist theories focused on the affective, material and more-than-human offer different insights into new digital configurations of agency and mediated learning. We reflect on this potential through analysing empirical data from a study involving arts-based workshops in two schools in the South West of England. Our focus on affect and agency as relational and entangled has important implications for theory and practice in school-based body image programmes and media literacy approaches.