Caring for a parent during emerging adulthood may be a disruptive and non-normative experience. Despite the growing prevalence of emerging adult (EA) caregivers, there remains limited research. We explored the experiences of EAs caring for parents living with advanced disease. Interviews were conducted with 12 EA daughters and analyzed using constructivist grounded theory. The core category was identified as negotiating accelerated adulthood, a dynamic interplay between feeling more of an adult than before and the paradoxical feeling of I’m not where I should be. Prior to the core category, participants’ caregiving role is assumed. Availability of support influenced participants’ process of negotiating accelerated adulthood. Findings highlight the uniqueness and developmental impact of this experience. Results suggest an interplay of different factors with how the role is assumed, appraised, and experienced by EA daughters. Greater awareness of these experiences may inform the development of tailored interventions and strategies for EA caregivers.