The Sonny Knight Quartette was an American R&B group active during the late 1950s and early 1960s. Led by vocalist Sonny Knight, the quartette was known for their rhythmic, soulful style that was heavily influenced by gospel and blues. Despite having a relatively short career, they made a significant impact on the R&B genre with their hit "Confidential," which reached number 18 on the Billboard Hot 100. Their unique blend of soul, gospel, and blues would go on to influence many artists in the R&B and soul genres.