PurposeThe purpose is to provide a brief summary on the current research development regarding the role of in-laws in family firms’ continuity. Additionally, I provide a perspective on the trends on the research regarding the in-laws involvement and influence in preparing future generations of family firms’ owners/managers. At the end, I conclude on what should be the relevant issues to be explored and researched in the future.Design/methodology/approachIn this paper, I review the literature on the role of in-laws on the family business continuity, particularly, I emphasize the involvement of in-laws in family firms. I found that this topic of family business continuity has not widely researched and the role of in-laws on the future of the family firm has been underestimated in the extant literature. I provide a brief summary on the trends related the involvement of in-laws in the family business continuity and, at the end, I give my conclusions on what should be a research agenda regarding this topic.FindingsDespite previous research, the question of the role of in-laws in family firms remains unanswered from the business-owning family perspective, nor from the in-laws’ perspective. The previous research has raised more questions on this topic. Clearly, the research landscape is vast, and scholars’ callings to find better ways to identify family members are totally justifiable.Originality/valueBased on the literature review, it can be argued that one of the topics with high potential for future research and development is related to the role of in-laws in the family business continuity, either because they are passively included as part of the family group, without acknowledgment on their involvement or because governance policies have formally excluded them. In this review, I highlight the influence of the in-laws in the family business continuity; particularly, their role in preparing future generations of family firms owners/managers and imprinting them with the family values, culture and believes.