Adopting an interpretivist approach, this book examines how highly diverse migrant constituencies coalesce into collective formations that mobilize as migrants. With a focus on three Italian cities, Naples, Rome and Bologna, this book utilises a unique approach to understanding migrants’ mobilizations by integrating Social Movement studies and Critical Studies of migration with a focus on temporality. Investigating biographical trajectories, collective memory, and identity-building processes, it reveals the invisible dynamics that occur between visible mobilizations and beyond migration experiences. Readers gain insights into how participants construct shared social pasts and negotiate collective identities, both in public representation and political belonging. Migrants’ Collective Action is essential reading for scholars, students, and researchers in migration studies, social movements, and urban studies. It is particularly relevant for those exploring the intersections of temporality, identity, and collective action, as well as practitioners working with migrant communities.