The association between attachment representations and adolescents' coping with 3 developmental tasks of emerging adulthood-leaving home, advancing in the capacity for mature intimacy, and developing individuation-was examined. Israeli male adolescents (N = 88) were administered the Adult Attachment Interview during their high-school senior year. A year later, they and their friends reported on the adolescents' adjustment to mandatory military service. Three years later, participants and their parents reported on the adolescents' capacity for intimacy using an in-depth interview and on their individuation. An autonomous state of mind was associated with better coping with basic training and with a higher capacity for mature intimacy but was not associated with markers of individuation. The results highlight the importance of attachment representations in shaping an individual's developmental trajectory.