This study employed a case study research design to explore how family caregivers experience caring for an advanced cancer patient enrolled in a palliative rehabilitation program. Demographic, case note, pre-post quality of life scores, and interview data sets were collected from four family caregivers throughout patient enrollment in the 8-week Ottawa Palliative Rehabilitation Program. Thematic analysis of the interview data revealed caregivers’ perceived caregiving as: 1) Being a Witness of the Patient’s Struggles, 2) A Duty Paired with a Desire to Support Patients - Regardless of the Challenges, and 3) A Role Which Requires Tailored Knowledge, Support, and Resources to Aid in Improving Patient Functioning and in Managing Caregiving Tasks. Involving family caregivers in palliative rehabilitation programs provides them an opportunity to engage with the patient and health care professionals in order to develop a shared understanding of the illness implications, learn tailored caregiving approaches, and gain social support.