Gene & Eunice were an American rhythm and blues duo composed of Gene Forrest and Eunice Levy, active primarily in the 1950s. Known for their harmonious blending of male and female vocals, they helped to popularize the R&B and doo-wop genres. Their most significant hit, "Ko Ko Mo," reached number 6 on the Billboard R&B chart in 1955, showcasing their signature sound of playful lyrical exchanges set to strong, rhythmic beats. Despite their limited discography, Gene & Eunice played an important role in shaping the sound of mid-century American popular music.