Sibling relationships are our longest-lasting relationships in life. Twenty-three percent of adults are already the primary caregiver for their adult brother or sister with a disability. The new Easter Seals Siblings Study calls attention to the experiences of siblings as caregivers, and the services and supports families need. The Study, conducted by Ipsos and made possible by MassMutual Financial Group, aims to better understand the implications of adults who have siblings with developmental disabilities.