There is a lot of interest in the idea that people can voluntarily change their personality traits. René Mõttus talks to Mathias Allemand, Gabriel Olaru, and Christoph Flückiger about personality change interventions. Why people want to change their personality traits, how can they do it, and how long could the effects last? They also discuss ethical issues related to trait change, and whether most people have already been subjected to a personality change intervention – at school.