Background: Paediatric palliative care (PPC) is an active, total approach to the holistic care of the child and family. Close, long-lasting relationships between healthcare professionals and parents in paediatric palliative care enhance quality, provide emotional support and can influence how parents manage their role in the face of uncertainty. Aim: To present a narrative literature review of long-term relationships between children's nurses and parents in PPC settings. Methods: Six databases (CINAHL, PsycINFO, ASSIA, Scopus, Medline and BNI) were searched, identifying 35 articles. A grey literature search produced seven additional relevant items. Findings: Four themes were identified: bonds; attachments and trust; sharing the journey; going the extra mile; and boundaries and integrity. All themes revealed an element of tension between closeness and professionalism. Conclusion: Gaining a greater understanding of how closeness and professionalism are successfully managed by children's palliative care nurses could positively influence pre- and post-registration nurse education.