Empirical evidence has been accumulating suggesting that victims and offenders share common risk factors and are often one and the same. Guided by this extant literature, this study provides a longitudinal examination of the relationship between physical aggression and violent victimization among a large sample of 2,671 urban minority youth and young adults from Chicago. The results from a series of bivariate probit regression models, which allow the equations for physical aggression and violent victimization to be estimated simultaneously, reveal strong evidence of a victimoffender overlap. Additional results suggest that this victim-offender overlap cannot be merely explained away by a commonality of risk factors and demographics alone. Study limitations and policy implications are also discussed.