e-Participation depends on a community of users-citizens who constructively engage and collaborate with governments and decision-makers on key democratic and social matters. Effective serious communication requires meaningful social interactions supported by relevant community-building efforts. We argue that achieving that is more visible by engaging dialogue with a constructive shared viewpoint rather than thorough discussions or argumentation. The emerging social Immersive Virtual Reality technologies supply a novel mode of digital communication that brings an opportunity to overcome some of the challenges hindering e-Participation. In this paper, we present the key concepts and explore the principles of Dialogue in the context of serious communication. We link those principles with specific Immersive VR affordances and propose a Framework for Virtual-Reality-Mediated Serious Communication – VR-Dialogue. Finally, we discuss the implications of employing that framework to support e-Participation through an additional component: VR-Participation.