This report provides an overview of the Side Event on Physical Activity and NCDs, which took place September 18, 2011, in front of the UN High-level Meeting on Non-Communicable Diseases, in New York City. The Side Event was organized by the American College of Sports Medicine, in partnership with Wellness Week organizers (the Pan American Health Organization and the World Economic Forum), the CDC/WHO Collaborating Center for Physical Activity and Health, and the President’s Council on Fitness, Sports & Nutrition. United by a shared conviction about the role of physical activity and sports in contributing to healthy people and heath-enabling environments, the Side Event drew the U.S. Surgeon General, national ministers of health, Olympic athletes, delegates to the U.N. High-Level Meeting, and leaders from nonprofit organizations, philanthropies, governments and business.