Being politically interested is one of the most important norms from a democratic perspective, as it is a crucial antecedent for voting, political knowledge, civic and political participation, and attentiveness to political information. However, only limited research has focused on the relationship between media use and political interest, despite the notion that modern politics is mediated politics. Even more important is the fact that the causal relationship between media use and political interest still has not been firmly established. Against this background, the purpose of this study is to investigate the causal relationship between news media use and political interest. The results show that there are indeed causal and reciprocal relationships between political interest and attention to political news, and between political interest and exposure to some, but not all, news media. Overall these results lend stronger support to the perspective of media mobilisation theories than media malaise theories.