<p>This article examines the multidimensional nature of feminist solidarity among Polish migrant activists in the UK, emphasizing the intersections of gender, migration, and political belonging in transnational feminist activism. Based on in-depth interviews with Polish feminist activists, the study explores how these activists engage in transnational mobilization, navigate intersectional and migrant feminist solidarity, and sustain engagement through affective and emotional bonds. The findings reveal how Polish feminist migrants leverage transnational networks to support feminist struggles in Poland while simultaneously engaging in the broader European feminist movement. The study also highlights the agonistic dimensions of solidarity, illustrating how activists negotiate ideological and strategic differences within their networks. Additionally, it analyzes how socio-political events such as Brexit have reshaped migrant feminist activism by altering legal statuses, intensifying anti-immigrant sentiment, and reinforcing solidarity with other marginalized groups. The article demonstrates that migrant feminist activism is a dynamic, adaptive, and contested process, shaped by transnational engagement, intersectional alliances, and emotional resilience. By framing Polish migrant feminist activism within a broader transnational solidarity model, this study contributes to the ongoing debates on feminist mobilization, migrant activism, and transnational political engagement.</p>