This chapter explores the gendered implementation of the Youth, Peace and Security (YPS) agenda in Iran through the lived experiences of young Iranian women peacebuilders. Drawing on insider knowledge, feminist peacebuilding theory, and historical context, the chapter examines how young women navigate systemic repression, patriarchal structures, and limited civic space to claim political agency. It traces key movements, including the One Million Signatures Campaign and Women, Life, Freedom, highlighting how these youth-led initiatives reflect both resistance and resilience. Despite exclusion from formal policymaking spaces, young Iranian women have continued to build peace through decentralised activism, transnational networks, and informal coalitions. Their efforts underscore both the limitations and transformative potential of the YPS agenda when contextualised in authoritarian settings. The chapter calls for greater recognition, protection, and inclusion of young feminist peacebuilders who continue to shape Iran’s socio-political landscape despite being sidelined by both national and international institutions.