In this article, I argue that we need to consider connected resilience as a 'Grand Challenge' for the 21st Century. Grand Challenges are complex challenges with far-reaching societal implications that lack a clear solution. They reflect the reality that society is increasingly interdependent – a system of systems – where challenges and changes have the potential to disrupt people, organisations, communities, economies and societies. Wellbeing, informal networks, and community engagement are just as crucial in building connected resilience as robust infrastructure and systems.