Throughout the last decades, various non-state actors have been actively engaged in different aspects of international governance. More recently, a number of academic contributions explored the extent to which international law governs non-state actors. This Article advances the argument and explores whether non-state actors have developed law making capacities. Initially grounding itself in the Nuclear Tests and Kosovo cases of the International Court of Justice, the Article contends that non-state actors can create international rights and obligations through unilateral law-making processes. After a robust study, the Article concludes that unilateral non-state actions must meet three criteria to have legal effect as international law. First, producing such actions requires non-state actors of significant gravity. Second, other international entities must at least partly recognize these actions. Third, unilateral actions must justify their legal character with legitimate grounds. In meeting these three conditions, such unilateral actions of non-state actors produce international legal effects. As to its broader implications, the Article argues that the scope of international law has expanded to ensure that the voices of major international non-state actors are heard and reflected within the international legal order.