This chapter explores the pivotal roles that youth play in shaping peace across the Southeast Asia region. The chapter highlights how young people utilise their agency and leadership to influence peacebuilding initiatives in governance and grassroots movements. Despite persistent structural barriers—including the systemic ‘violence of exclusion’—youth engagement is crucial for long-term peace and security. The chapter advocates for applying feminist peace theory to the Youth, Peace and Security (YPS) agenda, emphasising the need for youth participation that is meaningful, intersectional, and institutionalised. By centering the lived experiences of diverse and marginalised youth, this approach creates a foundation for more just and durable peace outcomes tailored to Southeast Asia’s unique postcolonial context.