This analysis examines supranational constitutionalism in the European Union (EU). In particular, the study focuses on the role of the European Court of Justice in the creation of women's rights. I examine the interaction between the Court and member state governments in legal integration, and also the integral role that women's advocates—both individual activists and groups—have played in the development of EU social provisions. The findings suggest that this litigation dynamic can have the effect of fueling the integration process by creating new rights that may empower social actors and EU organizations, with the ultimate effect of diminishing member state government control over the scope and direction of EU law. This study focuses specifically on gender equality law yet provides a general framework for examining the case law in subsequent legal domains, with the purpose of providing a more nuanced understanding of supranational governance and constitutionalism.