This chapter is contributed by InFo-TED, the International Forum for Teacher Educator Development. This newly established community brings together people from across the world to exchange research, policy, and practice related to teacher educators’ professional learning and development. We define teacher educators broadly as those who are professionally involved and engaged in the initial and on-going education of teachers. Our contention is that while there is general agreement about the important role played by teacher educators, their professional education is under-studied and under-supported. Here, we elaborate the rationale for this initiative, delineate our conceptual framework, and provide examples of steps taken in Belgium, Ireland, and Norway to develop the professional identities and knowledge bases of those who educate and support teachers, and conclude with implications for a implications for a scholarly study agenda having to do with research, policy, and practice relating to teacher educators’ professional development.