Although sibling relationships are significant and enduring throughout the lifespan, research concerning relationships among young adults and their autistic siblings is scarce. The goal of this study was to gain a deeper understanding of multiple features of the sibling relationship from the perspectives of young adults with autistic siblings. Eleven participants completed a semi-structured interview focused on sibling communication, shared activities, family impact, benefits, and personal influence of having an autistic sibling. Qualitative analysis of participant perspectives yielded themes including Personal Qualities and Perspectives, Barriers to Communication, and Family Challenges and Limitations. Over half of the participants shared that their sibling influenced their chosen career path. Results are discussed in relation to previous literature, with an emphasis on the importance of acknowledging and supporting relationships between autistic individuals and their siblings.