Background: Spiritual care is integral to palliative care. It engenders a sense of purpose, meaning, and connectedness to the sacred or important and may support caregiver well-being. Aim: To examine caregivers’ spirituality, religiosity, spiritual well-being, and views on spiritual/religious support. Design: A mixed-methods study across 4 Australian sites, recruiting caregivers of patients with a life expectancy of under 12 months.