Objective: This study explored relationships between aggressive script rehearsal, rumination, and anger rumination with aggressive behavior. Method: One hundred and twenty-nine incarcerated males (M = 33.54, SD = 8.67) completed the Schedule of Imagined Violence, Preservative Thinking Questionnaire, Anger Rumination Scale, and the Life History of Aggression-Aggression subscale. Correlations were run to examine associations between the variables and a four-step sequential multiple regression was performed to assess for the unique contribution of rumination, anger rumination, and aggressive script rehearsal to aggressive behavior.Results: Results revealed moderate-strong positive associations between aggressive script rehearsal, rumination, and anger rumination. Moderate-weak associations were found between these three constructs and aggressive behavior. Regression analyses revealed aggressive script rehearsal was uniquely related with aggressive behavior and path analysis demonstrated aggressive script rehearsal