There is enormous variability in the language outcomes of children with ASD – from minimally verbal to intact linguistic knowledge. Over the past two decades, significant progress has been made in parsing this variability, investigating the relationship between language in ASD and in other disorders, and understanding the developmental progression and neural foundations for language from infancy through adulthood. In this presentation, I will discuss what we currently know about language in ASD taking a developmental and neurobiological perspective through investigations of infants at risk for ASD.