Motor stereotypy is a type of repetitive motor behavior frequently occurring in autism spectrum disorder (ASD). Individuals with maladaptive daydreaming (MD) report repetitive motor behavior associated with addictive and immersive daydreaming. Many autistic self-advocates report symptoms of MD. Motor stereotypy in ASD is associated with lower cognitive and adaptive functioning; yet, research has not thoroughly examined the relationship between MD and ASD. The purpose of this commentary is to briefly summarize the potential overlap between ASD and MD and highlight similarities and differences between the two. This author concludes there is reason to believe MD symptoms are common in ASD and require further understanding for proper treatment and intervention.