Dystonia is the third most common movement disorder. It is characterised by involuntary sustained or transient muscle contractions across body regions, which cause painful and debilitating changes in posture and movement control. Despite decades of research, the fundamental patho-mechanisms driving dystonic movements remain mysterious. The UCL Dystonia Day Symposium seeks to bring basic and clinical researchers together to address this critical question. The Symposium will showcase cutting-edge research from early career researchers investigating dystonia in cellular and animal models, and in human patients. We will provide an open Panel discussion with established leaders in the field, centred on current knowledge gaps and controversies in the field, and opportunities to present poster-based overviews of research from dystonia-focused laboratories. By creating a forum to share ideas and challenge existing paradigms, we hope that this Symposium will yield new collaborations that will help to advance the understanding and treatment of dystonia.