Some studies show that Gottfredson and Hirschi's low self-control plays an important role in alcohol use, but low self-control remains stable over time. Because self-control is not easily changed, the present study examines the ability of theory of planned behavior to mediate the effect of low self-control on intentions to use alcohol and alcohol use. Using a nonrandom prospective sample of college students, this study shows the theory of planned behavior partially mediates the effect of low self-control on alcohol use. The study also outlines possible policy implications of the findings.