The present study investigates 2-way bilingual immersion (TWBI) as a potentially viable pedagogical model for adult language learners. A review of the literature on TWBI at the K-6 level is provided, followed by an examination of key issues in adult second and foreign language education. Implications for potential adult TWBI programs are discussed along with recommendations for further investigation. Finally, the author presents an exploratory study of a nonformal, community-based adult TWBI program in Los Angeles known as I HABLO U. The results of this study suggest that while adult TWBI shares many of the learner and administrative challenges documented in K-6 TWBI programs, adult learners in TWBI programs contend with a unique set of problems and also enjoy a number of advantages that K-6 learners may not experience. The author concludes that scholars must widen the focus of current research and evaluative efforts of TWBI to consider adult learners.