Not many groups have joined the Opry cast during the modern era. That makes it all the more notable that in 1998 Diamond Rio became the first group since The Whites, who joined in 1984, to receive Opry membership. With their lighter-than-air harmonies, this six-man group has been turning songs into standards since its 1991 debut album helped define the “young country” movement. Diamond Rio has been awarded Top Vocal Group honors a total of six times from the Academy of Country Music and the Country Music Association. The group has sold more than 10 million records, earning five gold and three platinum albums in the process.