This study examined the effects of an early reading intervention on preschool-age dual language learners' (DLL) early literacy skills. Instruction in phonological awareness and alphabet knowledge was embedded in interactive reading strategies, also known as dialogic reading. A single subject multiple baseline across subjects design was applied to 15 DLL preschool children. The intervention was delivered in participating children's home language, Spanish (L1). Children's growth in emergent literacy skills in Spanish and in English was monitored during baseline and intervention conditions. Visual analysis of single subject graphs indicated gains across all participants. In addition, paired-samples t-tests showed significant growth between pre- and post-tests in both English and Spanish of participating children. The findings have implications for research, practice, and policy-making.