Entrepreneurial emotion refers to the affect, emotions, moods, and/or feelings—of individuals or a collective—that are antecedent to, concurrent with, and/or a consequence of, the entrepreneurial process, meaning the recognition/creation, evaluation, reformulation, and/or the exploitation of a possible opportunity. In this paper, we explore this working definition of entrepreneurial emotion, what it means, and some important advances the field has made in this area of research. We also highlight fundamental avenues for future research that are sorely in need of study. Finally, we introduce the seven papers in this special issue on the Heart of Entrepreneurship and how they move the conversation on entrepreneurial emotion forward.