 The primary aim of this project is to examine whether adolescent depression and the associated symptoms of sleep disturbance are best treated using an empirically supported psychotherapy that is augmented with a sleep improvement module. Twenty adolescents ages 12-17 who meet criteria for major depressive disorder, dysthymic disorder, depressive disorder not otherwise specified, or adjustment disorder with depressed mood and also report elevated levels of sleep disturbance will receive Interpersonal Psychotherapy for Depressed Adolescents IPT-A with an adjunctive sleep module that is integrated throughout the treatment. Identifying the best approach to treating both the adolescents depression and the commonly associated symptom of sleep disturbance will have significant implications for the long-term outcomes of depressed adolescents. Moreover, identifying unique symptom and biological profiles at the outset of treatment may enable doctors to predict treatment outcome. 