The Multiple Health Behavior Change Special Interest Group aims to contribute to the development of a science of multiple behavior change for health promotion and disease management. Intervening on multiple health behaviors presents a unique set of challenges. The group addresses theoretical, methodological, intervention, statistical and funding issues related to targeting multiple health behaviors for change. Relevant targeted behaviors include but are not limited to: tobacco and other drug use, physical activity, nutrition, HIV-risk behaviors, sun exposure and stress. Our cross-disciplinary group is designed to enhance the professional development of its members by fostering networking, mentorship, career development and scientific discussion.