While evidence of politicization piles up, the discussion on its mechanisms is far from complete. So far, literature has concentrated on the electoral dimension of politicization, leaving aside the question on whether parliament plays a role on it. We present a new dataset of EU related media outputs in order to assess under what conditions they incorporate national parliamentary arenas in Germany, France and the UK. This advances our understanding of the role of national parliaments on the process of politicization of EU policy-making. The findings indicate that parliamentary arena or its players appear more in EU related media the higher the level of EU plenary debate. The influence of electoral Euroscepticism and the level of formal monitoring powers lay mixed results depending on the country.