"Sara Smile" was the second single released from Hall & Oates' 1975 self-titled album for RCA Records. Cowritten by both halves of the duo, it was Hall & Oates's breakthrough single,[3] with a #4 peak on the Billboard Hot 100 charts in 1976.[4] It was written about Hall's then-girlfriend, Sara Allen.[5] The couple were together for almost 30 years before breaking up in 2001.[6]