Child Trends analyzed panel data obtained from a sample of 6,763 heterosexual young adults from Add Health (the National Longitudinal Study of Adolescent Health), which allowed us to examine whether symptoms of depression or suicide in adolescence predict unhealthy romantic relationship outcomes (relationship violence and sexual infidelity) in young adulthood. Our analyses extend previous research by examining the association over time between depressive or suicidal symptoms in adolescence and young adult romantic relationship outcomes, using a nationally representative sample of young adults.