The objective of this research project is to enhance our understanding of the social risks associated with the comorbidity of depressive symptoms and overweight in adolescence. The project is particularly timely and important due to the evidence of increasing overweight and depression rates in adolescents. A major goal of the research will be on generating awareness and a stronger evidence base of the early-life determinants of mental and physical health comorbidity, as well on the need to intervene early to reduce the long-term consequences of adolescent health problems. The findings can thus help to inform policies to help intervene early in the accumulation of social disadvantage and ill health, which has the potential of substantially improving population health.