Sibling relationships remain understudied in typically developing adolescents who have siblings with autism spectrum disorder (ASD). This study explored the lived experiences and perceptions of adolescents who have a brother or a sister with a diagnosis of ASD using semi-structured interviews. Using thematic analysis, the participants reported having difficulties communicating with their siblings. Feeling a mixture of emotions was common when interacting with their siblings with ASD and emotional self-regulation was a typical coping strategy utilized by these adolescents. Despite the challenges, having a sibling with ASD led to closer relationships between the siblings. These findings offer insights into these adolescents' needs and how they may be best supported, informing the practice of speech-language pathology and other health professions.