This article draws on the findings from the qualitative phase of a New Zealand longitudinal study concerning vulnerable young people’s transitions to adulthood, the challenges they faced, their experiences with services and the factors that helped lead to positive outcomes. It reports on the experiences of foster parents and their perspectives on what contributed to meaningful support for these young people. The youth (aged 12 to 17 years at the time of their first interview) had experienced sustained exposure to harm, including abuse, violence, addictions, disengagement from school and mental health issues. They used multiple services (child welfare, juvenile justice, mental health and education support services). The study involved the administration of a survey (n = 593) and qualitative interviews over three years with a sub-sample of young people (n = 107). In the qualitative phase, they were asked to nominate a person whom they trusted to also be interviewed. Twenty-one chose a foster parent. Three thematic clusters emerged from the analysis of the foster parents’ interviews: the challenges in providing care to vulnerable youth; the provision of practical and emotional support; and foster parents becoming an enduring presence in their lives – holding hopes and dreams. The article concludes with a discussion that draws on ecological-transactional approaches and explores the key elements that enable foster parents to become an enduring presence for vulnerable young people.