Urban environments are accelerating their transformation towards cleaner, friendlier places able to respect and use resources more efficiently. Across Europe, cities are blending social innovation, engineering and ICT excellence and smart technologies to help reach these goals. IRIS is at the forefront of this change and announce itself as the newest addition to the European Commission Smart Cities and Communities (SCC) lighthouse projects. The project has been developed around three lighthouse cities - Utrecht (The Netherlands, coordinator), Nice (France), and Gothenburg (Sweden) - who will work as collaborators and test-beds for follower cities Vaasa (Finland), Alexandroupolis (Greece), Santa Cruz de Tenerife (Spain) and Focsani (Romania). Each city will draw upon a mix of universities and research organisations, local authorities, innovation agencies and private expertise to accelerate entire communities to adopt ambitious energy, mobility and ICT initiatives.