This session explores how digital twins—virtual replicas of physical city infrastructure—are converging with agentic AI systems capable of autonomous decision-making and adaptation. Together, these technologies enable real-time urban monitoring, predictive analytics, and responsive city management at scale. Attendees will gain insights into cutting-edge use cases, from facility management to resource optimisation, shaping the next generation of smart and sustainable cities, such as Punggol Digital District (PDD).