In recent years, agile methodologies for information systems development (ISD) have increasingly attracted the attention of the research community. Agile ISD methodologies are considered an effective way for managing ISD projects in environments characterized by rapidly changing requirements. Although the body of knowledge on agile ISD is constantly growing, we still lack a detailed understanding of the fundamental processes underpinning agile ISD methodologies. In this paper, we investigate how agile practices affect the team communication processes in order to extend our knowledge on the theoretical underpinnings of agile ISD projects. This is achieved by developing a preliminary research model that is based on a solid theoretical foundation. As a theoretical framework, we employ the unified model of ISD success and extend it with context-specific insights from the cognitive-affective model of organizational communication and media naturalness theory. In consequence, we suggest several propositions for future testing.