Virtual worlds are immersive, simulated, persistent and dynamic environments that include rich graphical 3-D spaces, high fidelity audio, motion, viewpoint, and interactivity. Initially dismissed as environments of play, virtual worlds have gained legitimacy in business and educational settings for their application in globally-distributed work, project management, online learning, and real-time simulation. Understanding the emergent aspects of these virtual worlds and their implications for organizations will require both new theories and new methods. We propose that a performative perspective may be particularly useful as it challenges the existence of independent objects with fixed or given properties and boundaries, and focuses instead on situated and relational practices that enact entangled and contingent boundaries, entities, identities, and effects.