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Abstract Background and Aims Metabolic syndrome (MetS) is a major risk factor for non‐communicable diseases, including type 2 diabetes mellitus, cardiovascular disease, and cancer. The risk of MetS can be transmitted via epigenetic processes from both the mother and the father. Therefore, it is essential that both members of a couple are targeted in pre‐conception nutrition and physical activity‐based lifestyle programs. However, lifestyle interventions targeting both members of a couple are scarce in the literature. This study, therefore, aimed to explore the barriers and facilitators of a couples‐based lifestyle intervention. Methods Nulliparous couples who had an interest in having children in the future were recruited to the study and each member interviewed separately to gain insight into to gain insight into designing future couples‐based lifestyle interventions. Interviews were conducted between June and October 2021. Reflexive thematic analysis (RTA) was applied to conduct and analyse semi‐structured, in‐depth interviews with nulliparous couples who had an interest in having children in the future. Results Four major themes were identified in nine couples aged 25–34 years (here referred to as “millennials”): Millennials are committed to preparation for their future offspring; millennials know features of a good program likely to have high adherence and long‐term behavior change; millennials acknowledge the importance of couples‐based programs; and millennials appreciate that future global emergencies may require lifestyle modifications. Conclusion This study found that millennial couples showed a strong intention to create optimal emotional, financial, and health conditions for their children. They supported couples‐based approach (CBA) lifestyle interventions to mitigate potential epigenetic risks. Couples believed that participating together in these programs would enhance adherence to healthy habits, promoting long‐term well‐being. The findings advocate for exploring and testing CBA interventions that target both partners, as joint participation not only aids in healthy conception and reduces metabolic syndrome risks but also establishes a foundation for family health. These insights highlight the potential of CBA interventions to positively impact future generations.