Research is key to supporting diversity and inclusion practices in media and creative industries because it articulates the structural and cultural barriers to participation by workers with a broad range of underrepresented social identities. However, currently there is a lack of research that problematises how change happens with regard to equality, diversity and inclusion in creative industries. Very little research looks beyond specific initiatives, particular employers or individual organisations to explore how change is adopted more broadly within the sector. This article seeks to address that gap by applying a number of literatures on policy and organisational or cultural change to generate a schema that allows the complexity of change to be understood through a unified model of a policy regime. This article adopts a qualitative case study methodology to examine equality, diversity and inclusion regime change in the film and television industries in Ireland from 2015 to 2021. Key findings map how policy goal changes, paradigm shifts in thinking on equality, organisational coalitions and a change in power arrangements all combined resulting in significant change in the gender and equality regime in Irish film and television work. This framework is valuable because it provokes questions about how equality, diversity and inclusion initiatives can be more effective, how various cases of change compare with each other and how some efforts at change ultimately fail.