The emergence of romantic relationships is one of the most striking features of adolescence. By the late adolescent years, most teenagers have been in a romantic relationship at least once and roughly half of teens are dating currently. Alarmingly though, in many of these relationships adolescents act aggressively toward each other and this behavior appears almost as early as relationships emerge. Aggression in adolescent dating relationships is of high concern. There are negative psychological consequences as well as the risk of physical injury. Moreover, use of aggression in dating relationships may set in motion a pattern of interpersonal violence that continues into adulthood. On the bright side, adolescence is a period of transition and opportunity. Preventing dating aggression at this developmental stage may reap significant positive outcomes later in life. In this article, the authors provide a review of adolescent dating aggression, focusing on warning signs and methods of prevention. (Contains 1 table.)