According to attachment theory, humans are relational beings and even a child's earliest experiences with caregivers have a profound effect on emotional development and an overall approach to relationships. With increasing regularity, couple therapy has utilized attachment language as a conceptual tool, but more work is needed to understand the full clinical implications of attachment theory. These include understanding the intergenerational nature of attachment and adapting the delivery, timing, and pace of interventions to client attachment strategies. In this article, we summarize the origins of attachment theory, its measurement, the role of attachment in couple relationships, attachment stability and change, and ways that attachment informs therapy process and intervention. We hope that this article will provide an impetus for couple therapists to expand their conceptualization and use of attachment in their clinical work and for couple researchers to conduct more clinically relevant, attachment‐oriented process research.