This chapter focuses on the importance of circular business models and the synergies they create within circular economy liveable cities. Circular business models emphasise reducing waste, reusing resources, and recycling materials, promoting sustainable economic growth while addressing environmental challenges. By fostering innovation, resource efficiency, and collaboration across various sectors, these models help cities transition to a circular economy. The chapter highlights the role of leadership, imagination, and curiosity in driving this transformation. Leaders are key to setting ambitious goals and mobilising resources, while imaginative thinking and curiosity foster the development of innovative solutions to urban challenges. Examples from companies like Interface, Patagonia, and Philips Lighting demonstrate how visionary leadership and creative business models contribute to sustainability and circularity. The chapter explores the synergies between circular business models and urban systems, with case studies from cities like Amsterdam and Paris. These cities have adopted circular strategies that integrate sustainable waste management, renewable energy, and resource-efficient practices, showcasing the transformative potential of circular economies. Ultimately, the chapter argues that circular business models are essential for creating resilient, sustainable cities. By leveraging leadership, innovation, and cross-sector collaboration, cities can foster circular economies that promote environmental sustainability, economic growth, and improved quality of life.