Research Findings. A randomized controlled trial evaluated the impact of Motheread/Fatheread Colorado (MFC), an early childhood literacy intervention, on parent reading behaviors and their preschool-aged children's literacy skills. Parents in the experimental condition participated in MFC; control parents did not. Dependent variables included measures of parental behavior supportive of reading in the home, and parent- and teacher-reported child literacy outcomes. Parents in the intervention group reported spending significantly more time reading with their children and a significantly greater use of interactive reading skills than parents in the control condition. Children in the intervention group scored significantly higher than children in the control group on parent-reported language and reading skills immediately following the intervention. There was no significant difference in immediate post-intervention teacher reports of child literacy skills. However, up to 15-months after program completion, children in the intervention condition had greater gains in teacher-reported language skills than children in the control condition. Results suggest that MFC is a promising intervention for changing the home literacy environment and children's literacy outcomes. Practice/Policy. Motheread/Fatheread may be a good fit for organizations interested in implementing interventions aimed at improving home literacy for preschool-aged children.