Hazan and Shaver’s (1987) work extending the principles of attachment theory to explain romantic relationships has led to increased interest in adults’ attachment behaviour and its effects on relational outcomes. This study investigated the associations between attachment security (styles and dimensions) and multiple aspects of relationship closeness. It also examined whether relationship quality moderates the associations between attachment dimensions and the use of distance regulation strategies, and whether relationship closeness moderates the associations between attachment dimensions and relationship quality. A penand- paper survey was completed by 159 participants, who were aged 18 years or over and currently involved in a romantic relationship of at least three months duration. As hypothesized, attachment anxiety was positively associated with intimacy goals and reported use of closeness strategies, while attachment avoidance was associated positively with identity goals and reported use of distancing strategies and negatively with measures of perceived closeness. Attachment avoidance was also linked to higher perceived risk in intimacy. Preoccupied individuals reported more use of involvement and attention as closeness strategies, while dismissing individuals reported more use of unfriendliness and withdrawal as distancing strategies. Attachment avoidance, but not attachment anxiety, was linked with lower relationship quality. Finally, results did not support the moderating role of relationship quality in the associations between attachment dimensions and distance regulation strategies, or the moderating role of relationship closeness in the associations between attachment dimensions and relationship quality. These findings highlight the robust nature of attachment-related effects, and the relevance of attachment theory as a framework for understanding individual differences in relational processes and outcomes. Future research could sample both partners of a couple, and use observational methods to capture attachment-related differences that may not emerge in self-reports.