The present study examined the extent to which individuals exposed to frequent and intense interparental conflict (IPC) across childhood and adolescence are sensitized to conflict during late adolescence. Late adolescents' perceptions of their exposure to IPC while growing up were examined in relation to their self-reported emotional and social-cognitive reactions to simulated conflict. Emotional functioning and gender were expected to moderate the relations of IPC to late adolescents' reactions. IPC exposure had stronger effects on the negative emotional reactions of adolescents low in emotional functioning and males than on the emotional reactions of adolescents higher in emotional functioning and females, respectively. Moreover, IPC was positively related to females' negative beliefs about conflict implications but unrelated to males' beliefs. Results are discussed in terms of the sensitization hypothesis and gender differences in sensitivity to conflict.KEY WORDS: interparental conflict; sensitization; emotional functioning; gender.