One pressing issue facing parenting interventions for disruptive behaviors of young children is forecasting who will benefit from participation. The purpose of this study was to examine four personal and interpersonal predictors (i.e., parent depressive symptoms, parent education, coparent conflict, and marital status) of engagement (i.e., number of sessions attended) in and child outcome (i.e., problematic behavior) of a parenting group curriculum program targeting young children's disruptive behaviors. Participants were 39 parents (34 mothers and 5 fathers; M = 38.6 years) who expressed an interest in improving the behavior of their 3- to 6-year-old child (19 females and 20 males; M = 4.50 years). Findings indicated that one baseline personal variable, parent depressive symptoms, predicted change in child disruptive behavior at follow-up, and two baseline interpersonal variables, marital status and coparent conflict, predicted engagement in treatment (i.e., number of sessions attended). Implications and directions for future research are discussed. (Contains 2 tables and 2 figures.)