A total of 50 behaviorally disruptive (conduct-disordered or oppositional defiant-disordered) adolescents and 50 comparison adolescents assessed how they expected to feel following both aggressive and nonaggressive situations. Compared with their peers, behaviorally disruptive adolescents expected fewer normative emotions and exhibited somewhat more of an anger emphasis in their nonaggressive emotion attributions, and they expected to feel happier following acts of instrumental/proactive aggression. These patterns of emotion expectancies were linked more closely with teacher ratings of adolescents' proactive aggression than with ratings of reactive aggression. Regression analyses indicated that both nonaggression emotion expectancies and proactive aggression happiness made independent contributions to predicting adolescents' externalizing tendencies. Discussion focused on the contributions of different types of self-attributed emotion expectancies to adolescents' social understanding and behavior.