The Sir Douglas Band, also known as the Sir Douglas Quintet, was an American rock band active during the 1960s and 1970s. Led by Doug Sahm, the band was notable for their fusion of British Invasion rock with Tex-Mex influences, creating a unique blend of sounds. The group's most significant hit, "She's About a Mover," is known for its catchy, distinctive twelve-bar blues format with a Tex-Mex flair. The band's eclectic style and ability to blend genres had a significant impact on the development of the Texas rock and the Chicano rock scenes.