A commitment to co-production in which social workers co-create research, knowledge, and practice with people from multi-disciplinary backgrounds and people with direct lived experience of accessing services, who are termed experts by experience (EbEs), underpins social work ethics and values. EbEs are understood to be people who use their experiences of accessing health and social care services to influence and change all forms of social work. Despite this, EbEs have, to date, had limited involvement in teamwork in social work practice, although their contributions to social work education, research and practice innovations, as peers in the team, are of growing significance. A narrative review was undertaken to explore the gap in the routine involvement of EbEs in different forms of social work practice-based teamwork. This narrative review identified three over-arching themes to understand how EbEs contribute to social work teamwork: involvement in team relationships and in decision-making, involvement in knowledge production, and involvement in health and social care practice innovations. However, it must be acknowledged that the everyday involvement of EbEs in social work, including in multi-disciplinary teamwork, apart from small pockets of mental health practice, such as peer support workers, is lacking. It appears that EbEs are involved in practice innovations, rather than everyday practice; therefore, despite social work’s political and ideological commitment to co-production, it is less advanced than is often claimed.