"Jack and Jill" is a 1978 hit song by R&B vocal group Raydio. It was the first single from their eponymous debut album Raydio, and became an international top 10 hit. It reached number eight on the U.S. Billboard Hot 100 and number six on the Cashbox Top 100. It reached number five in Canada, number four in Australia, and the top 20 in UK. It was the first of five U.S. top 10 singles by Ray Parker Jr. and/or Raydio.