Heavy drinking is a major public health concern, particularly among young adults who often experience fear of being stigmatized when seeking help for alcohol-related problems. To address drinking concerns outside clinical settings, we tested the feasibility of a novel imagery-based behavior change strategy led by student lay interventionists in a college setting. Participants were adults recruited on a college campus and were randomized to either learn the four steps of WOOP (Wish, Outcome, Obstacle, and Plan) or to learn a format-matched Sham WOOP (Wish, Outcome, "Outcome," and Plan). Both WOOP and Sham WOOP interventions were taught by student lay interventionist. We found that the WOOP intervention group reported fewer heavy drinking days ([greater than or equal to] 5 drinks for men or [greater than or equal to] 4 drinks for women, measured using the Alcohol Timeline Follow-Back Method) compared to the Sham group at the 1-month and 2-month follow-ups. WOOP, when taught by student lay interventionists in a single session, demonstrated the feasibility of reducing heavy drinking. WOOP shows promise as a low-cost and scalable intervention for reducing heavy drinking in nonclinical settings.