<p>This study examines the interplay between interest groups’ media prominence and parliamentary attention. Using datasets from 2005 to 2022, it analyzes Flemish television news content and oral questions in the Flemish Parliament. Results based on time-series analyses indicate that the more interest groups are featured in news items, the greater the parliamentary attention to the underlying issues addressed. This effect is mediated by general news coverage: interest groups’ presence in the news increases general media attention to the issue at stake, leading to increased attention in parliament. The study also examines how political parties respond to these issues, revealing that both government and opposition parties, as well as niche and mainstream parties, are likely to respond to interest groups’ media prominence. However, the results also show that while issue owners are generally more likely to respond to increased media attention, nonowners become more prone to respond when a higher share of news items features interest groups. Overall, this study sheds light on the complex dynamics between interest groups, media attention, and parliamentary agendas and underscores the pivotal role of party-specific traits in shaping political responsiveness.</p>