AbstractThis article analyses how international advocacy campaigns approach and define media freedom, and what influences this process. It does this through a two-year case study of the Media Freedom Coalition—an intergovernmental partnership of over 50 countries—that included 55 interviews with key stakeholders, observations, and document analysis. This revelatory case sheds light on how norms of media freedom are constructed and contested on the international stage, and their implications for journalists, media freedom and geo-politics. We show that the Coalition adopted a state-centric, accountability-focused, and negative understanding of media freedom. This discourse legitimized a narrow, reactive, and “resource-light” approach to supporting media freedom, focused on “other” countries. We argue that critical norm research provides a helpful prism for understanding this Coalition’s operations, and the global politics of media freedom more generally. These findings have important implications for understandings of “norm entrepreneurship,” “media imperialism,” and “media freedom” itself.