As a household panel study, Understanding Society creates unique research opportunities for studying family dynamics within and across households. It follows families as they form, expand and when family members move on. It enables interrelations between couples, different generations and siblings within households to be explored. By following people when they leave the original household it enables research on separation, coparenting and intergenerational topics across households. This paper outlines these broad research opportunities and presents two illustrative research questions.  Understanding Society tracks information before, during and after pregnancy, generally for both parents, and the baby, enabling unique insights into child development. In later life, partners or other family members can often become carers, but this role isn’t always recognised affecting the formal support available. By collecting data on all family members such hidden caring can be identified and the impact on carers’ relationships and wellbeing can be explored. However, doing this kind of research requires complex data management, and often needs multiple waves to achieve sufficient sample sizes. The Understanding Society team has developed a range of resources, and innovative new data collections to enhance research on such family dynamics. This presentation will outline these resources and future research opportunities