Aim: The arts have the potential to increase public awareness about mental health and reduce stigma. However, arts-based projects to raise awareness have been smallscale. In this study, a mental health-awareness audio tour of The National Gallery in London was co-produced and narrated by young adults with relevant lived experience. The study investigated the acceptability of the tour to the public and evaluated its impact on public attitudes about mental health.Methods: Participants were Gallery visitors over four consecutive days. The tour led visitors on 10 stops through the Gallery. Each stop focused on artworks and Gallery spaces, challenged common myths about mental health, and invited visitors to consider their personal views. Participants completed measures of mood and attitudes about mental health pre-and post-tour and provided narrative feedback.Results: Pre-tour, participants (N = 213) reported high levels of happiness, compassion towards people with mental health conditions, comfort talking about mental health, and positive attitudes about mental health. Post-tour, participants (N = 111) reported significant increases in happiness, comfort, and positive attitudes. In