Background: Childhood cancer impacts the family system and has psychosocial consequences for all family members. For the parents, the ill child, and the siblings to be able to adjust to this challenging situation, the whole family needs access to psychosocial support. However, only a few such family interventions in pediatric oncology have been evaluated. The aim of this study was to explore the potential effects of a family-centered intervention, the Family Talk Intervention (FTI), in pediatric oncology from the parents' perspectives. Methods: A concurrent mixed methods design was used for this study. Data were derived from a pilot study of 26 families recruited from one pediatric oncology center in Sweden. This study focused on questionnaire and interview data from 52 parents. Results: After participation in FTI, the parents felt more satisfied with the conversations within the family about the illness. FTI also contributed to strengthened family togetherness, including more open communication and improved family relations, as described by the parents. Parents further expressed that they felt more empowered in their parenting role following FTI. Conclusions: The findings regarding FTI's ability to improve family communication and family relations, thus strengthening family togetherness in families with childhood cancer, are promising. This provides motivation for a large-scale study of FTIs in pediatric oncology.