The Osborne Brothers were an influential American bluegrass duo formed by siblings Bobby and Sonny Osborne. Known for their tight harmonies and innovative approach, they helped modernize bluegrass music by incorporating electric instruments and drums—unusual for the genre at the time. Active primarily from the 1950s through the 2000s, they earned a place in the Bluegrass Hall of Fame and are celebrated for their lasting impact on the evolution of bluegrass and country music.