Person-centred care (PCC) is widely recognized as a cornerstone of quality health and social care, promoting dignity, autonomy, and individualised support. In increasingly multicultural societies, traditional models of PCC often fall short in meeting the cultural, spiritual, and psychosocial needs of diverse adult care populations. This gap is particularly evident in adult care settings where service users’ values, beliefs, and community affiliations play a critical role in their well-being and care engagement. Faith leaders and cultural advocates, as trusted figures within their communities, possess deep contextual knowledge and relational authority that can bridge cultural divides and strengthen the relevance of care services. This paper examines an integrated framework for co-producing person-centred care services through structured collaboration between adult care professionals, faith leaders, and cultural advocates. It explores the potential for such partnerships to enhance culturally responsive assessment, shared decision-making, and continuity of care. Drawing on examples from diverse urban and rural care environments, the study outlines practical co-design methodologies, including participatory workshops, culturally tailored communication tools, and joint training modules. Attention is given to challenges such as balancing professional standards with faith-based practices, mitigating bias, and ensuring equitable representation across cultural groups. By embedding faith leaders and cultural advocates into the care planning and delivery process, this co-production model offers a sustainable pathway to improve trust, reduce health inequalities, and enhance care outcomes in adult services. The findings underscore the need for policy frameworks and funding mechanisms that formally recognise and support these collaborative roles within person-centred care ecosystems.