This article demonstrates how the Group of Twenty (G20) constituted a new G20 politics following the 2008–09 global financial crisis through practices of networked global economic governance. This increased the influence of actors other than officials from leading wealthy states, especially developing- and non-state actors, thus augmenting global governance inclusivity and decentralizing authority. The G20 became the principal hub of global economic governance by influencing and engaging with diverse stakeholders on its broad policy agenda. These networked-governance processes expanded aspects of multilateral cooperation, including transversal approaches to policy issues such as sustainable development. This analysis builds on recent literature on transnational actors, governance networks, and the G20; contributes to emerging constructivist literature on the normative significance of practices and social-relational processes in international relations; and includes a significant discourse-analytic focus on repoliticization and legitimizing discourses. This study indicates, in particular, the political and normative consequences of G20 inclusivity practices for integrating global governance networks.