Emotions play a powerful role in close relationships. Significant progress has been made in understanding the temporal features of emotions associated with the development and maintenance of close relationships across the lifespan. This advancement has revealed further questions: which theories help conceptualize interpersonal emotion dynamics? What are the ways researchers can assess and model these dynamics? How do interpersonal emotion dynamics manifest in different close relationships? And do these emotion dynamics contribute to the maintenance or dissolution of relationships? Interpersonal Emotion Dynamics in Close Relationships addresses these and other questions by bringing together state-of-the-art perspectives from scholars widely recognized for their contributions to the study of emotions in relationships. Each chapter defines interpersonal emotion dynamics, reviews methodological or empirical work, and offers important directions for future research. This volume will be a valuable resource for students, researchers, and practitioners interested in understanding the role of emotions in relationships.