This article argues for the need for theory in the practice of interprofessional education. It highlights the range of theories available to interprofessional educators and promotes the practical application of these to interprofessional learning and teaching. It summarises the AMEE Guides in Medical Education publication entitled Theoretical Insights into Interprofessional Education: AMEE Guide No. 62, where the practical application of three theories, social capital, social constructivism and a sociological perspective of interprofessional education are discussed in-depth through the lens of a case study. The key conclusions of these discussions are presented in this article.