Drawing on international research, policy, and practice, this article explores what is meant by service user involvement, how it has developed, and how it has been implemented across different areas of practice. Using examples from across the health and social care fields, it reflects on how the learning from other areas of practice in which service user involvement has been successful may be applied to the family justice field. The arguments presented highlight the value of taking a bottom‐up approach in designing and implementing innovations in family justice, which would embrace the views of family members, including children, as ‘service users.’ It is important, however, to balance both the challenges and the opportunities offered by involving those who are ‘experts by experience’ in the family justice processes, in order to lead to improved services and experiences.