This chapter seeks to conceptualise the multi-actor character of what we refer to here as EU(ropean) foreign and security policy. It takes a holistic approach to European foreign and security policy—a policy that covers multiple areas and is carried out by a multitude of actors and institutions. While the framework builds on institutional approaches, such as the literatures on multi-level governance and Differentiated Integration (DI), it adds a new dimension by applying a somewhat broader definition of European integration—a definition that captures more than just the processes that occur within the EU. Applying a broader approach towards European integration allows us to continue to perceive the EU as central to the European integration process, while also allowing for the inclusion of other processes that in some ways, either formally or informally, are linked to the EU. We argue that such a framework better captures the dynamics of today’s increasingly complex EU(ropean) integration process, characterised by opt-outs and opt-ins, formal and informal processes, enhanced cooperation, and various forms of governance led by actors at different levels and with different types of relations to the EU. As we will show in this chapter, a more generic definition of integration helps us develop a framework that captures this complexity and sees clearly the different roles EU institutions play in the various policy areas. The intention is to present a more inclusive conceptual framework that fills two key gaps in the existing literature on European integration in this area.