There are several concerns in relation to children living with a parent suffering from a mental illness. In such circumstances, the health-care professionals need to involve the whole family, offering help to the parents on parenting as well as support for their children. These children are often helped by participating in meetings that provide them with contact with others with similar experiences. The aim of this study was to investigate young adults' childhood experiences of support groups when living with a mentally ill parent. Seven young women were chosen to participate in this study. A qualitative descriptive method was chosen. The main category emerged as 'the influence of life outside the home because of a parent's mental illness' from the two generic categories: 'a different world' and 'an emotion-filled life'. The participants' friends did not know that their parent was ill and they 'always had to…take responsibility for what happened at home'. These young adults appreciated the support group activities they participated in during their childhood, stating that the meetings had influenced their everyday life as young adults. Despite this, they associated their everyday life with feelings of being different. This study highlights the need for support groups for children whose parents suffer from mental illness.