We analyse the Gillick decision from the UK with regard to adolescent medical decision-making and the concept of the ‘mature minor.’ We discuss the legal aspects of ‘Gillick competence’ and consider the limitations of the Gillick decision in ethical and practical terms. Finally, we consider alternative framings of adolescent medical decision-making. Host: Prof John Massie. Guests: Annabelle Mann, RCH General Counsel, Prof Lynn Gillam and Prof Clare Delany, Children's Bioethics Centre, RCH.