This document discusses stakeholder engagement in patient-centered outcomes research. It begins by explaining the change from a researcher-centered model to including stakeholders. Key stakeholders are identified as patients, providers, drug/device companies, insurers, and advocates. Stakeholder engagement is required by PCORI to support funding, improve enrollment, strengthen research design, and broaden impact. Examples are provided of how a study on uterine fibroid treatment engaged stakeholders in design, recruitment, and dissemination of results. Challenges and new approaches like crowdsourcing input are also discussed.