Little research has focused on the ways that eating disorder processes and adult couple dynamics influence one another. The purpose of this study was to investigate the reciprocal influence of couple dynamics and eating disorder illness and recovery processes. We conducted 51 interviews with 17 couples where one member identified as currently suffering or having recovered from an eating disorder. Using grounded theory analytical methods, findings include the systemic interplay of the eating disorder and relationship, both partners' perspectives on the eating disorder and its role in the relationship, the noneating disorder partner's impact on the eating disorder, and coping strategies for recovery as a couple. Clinical implications for supporting couples experiencing eating disorder illness and recovery are discussed.