The outcome of the Brexit referendum has led to a highly mediatized battle of power between the British government and parliament over how much influence the latter can exert over the British position in the negotiations with the European Union (EU). At the same time, the role of parliaments in the remaining member states has received virtually no public attention, despite the fact that the stakes are also high for their publics. The aim of our chapter is to shed light on dynamics of parliamentary control of Brexit in the remaining member states through a comparative study of the German, Czech and Luxembourgish parliaments. Each of these member states has one or several key interests at stake in the negotiations, such as exports, the financial sector and future contributions to the EU budget (Germany, Luxembourg), or migration to the UK and the maintenance of EU policies and their budgetary health (Czech Republic). The three cases represent geographical diversity and differently sized countries, to take into account different levels of governmental influence over the Brexit negotiations. The study will focus on the formal powers of parliaments, their actual mobilization and the key dynamics that mark their scrutiny of the Brexit negotiations.