Building on their respective expertise and experience, UNICEF and WHO are working together to accelerate action for children and adolescents’ mental health and psychosocial well-being and development through a Joint Programme. The UNICEF and WHO joint programme on mental health and psychosocial well-being and development of children and adolescents: global case for support is designed to be a one-stop document providing succinct and relevant information on the Joint Programme for external and internal audiences, particularly potential partners.