This research tested whether adult attachment orientations predict use of emotion regulation strategies in theoretically consistent ways, and whether associations among attachment orientations and emotion regulatory strategies are moderated by critical features of the relationship context. Ninety‐six couples (192 individuals) reported on their attachment orientations, habitual use of emotion regulation strategies (cognitive reappraisal, expressive suppression, negative emotion expressivity), and perceptions of relationship closeness and negative partner behaviors. Highly secure individuals reported greater use of cognitive reappraisal, especially when they felt closer to their partners, and engaged in less suppression when their partners behaved more negatively toward them. Highly avoidant individuals reported greater use of suppression, especially when they perceived more negative partner behaviors, and when their partners were more avoidant. Highly anxious individuals also used more suppression when their partners were more avoidant, but they expressed more negative emotions when they were paired with less avoidant partners. Fearful‐avoidant individuals' emotion regulation patterns resembled those of both highly secure and dismissive‐avoidant individuals. This study illustrates how attending to moderating effects within specific relationships and testing joint effects of both partners' personality characteristics can help identify contextual boundaries of emotion regulation strategies and clarify emotional response patterns in couples.