Long regarded as an impossible dream, Artificial Intelligence (AI) is now a reality. Advances in AI regularly make headline news, and the steady advance of AI looks set to change our world dramatically. In this lecture (aimed at anyone from age 16 up), Professor Michael Wooldridge explains the reality of AI today: what makes AI work after half a century of effort, what is possible, and what the implications are for all of us. Wooldridge is Head of Department of Computer Science at the University of Oxford. He is one of the world’s most cited AI scientists, and chairs the European Association for AI.