This paper provides an introduction to this Special Issue on “Family migration processes in a comparative perspective”. Following an introduction to the topic, we provide summaries of the papers in this Special Issue and discuss afterwards some overarching theoretical perspectives. This Special Issue contains papers that explore how family lives and intimate relationships are constituted and re-constituted under conditions of transnationality. The authors of the contributing papers, although they have followed very different theoretical and methodological paths, underscore the effect of conducting and facilitating family life and couple relationships during or after an international migration process. They show that the couples and multigenerational families in transnational contexts are constantly undergoing processes of constitution, negotiation, and reconstitution. We conclude that future research should shift from focussing solely on the individual to examining couples and families, and it should adopt dynamic, rather than static perspectives when studying family migration.