Theories of voting rights differ quite sharply with regard to whether or not they support (rapid) enfranchisement of irregular immigrants. In this paper, we first outline these theories and their implications. We then assess a number of reasons against rapidly enfranchising irregular immigrants. We find, on reflection, that none of these reasons are persuasive. While this result is not in itself sufficient to draw strong conclusions, it does offer some support to the more inclusive theories of voting rights, and poses a challenge to the less inclusive ones.