This volume CCIS 2663 constitues the proceedings of the First International Conference on Real Emotions and Affect in Extended Realities, REALITIES 2024, held in Milan, Italy on July 5, 2024.

The 12 full papers were carefully reviewed and selected from 30 submissions. These papers were organized in following topical sections: Emotions in Virtual and Transformative Natural Environments; Clinical and Psychological Applications in VR; AI, Video Games, and Emotions; Methodologies & Tools for Studying Emotions in VR; Virtual Emotions and Theoretical Concepts.