Beginning with two vivid examples that illustrate the Handbook’s core arguments—that politics is performative, performance is political, and that both of these matter to understanding our worlds—the introduction provides a current, contextual account of the shared syntax of politics and performance. It defines key terms, such as politics, performance, theatricality, and performativity, that inform the Handbook contributions. Through accessible and provocative engagements with new ways of thinking about politics and performance in both disciplinary and interdisciplinary modes, the introduction shows that these categories are interwoven and entangled in complex and consequential ways. It outlines the states of the art in theater and performance studies and politics, respectively, capturing key points of interconnection between these discourses in order to build on, extend, and reshape interdisciplinary conversations. Finally, it reflects on key challenges and opportunities that attend bringing the two broad fields together for mutual enrichment and building a new, hybrid field of study. Underlining the co-constitutive nature of performance and politics, the introduction suggests that such a framework is critical to promoting an interdisciplinary approach to understanding the complex political world of the twenty-first century.