The Sir Douglas Quintet was an American rock band active from the mid-1960s to the late 1990s, known for their fusion of Texas-rooted country, rock, and Tex-Mex music. Founded by Doug Sahm and Augie Meyers, the band's breakthrough hit was "She's About a Mover," featuring a distinctive Vox organ riff. Their style was influential in the development of the Tex-Mex rock genre, blending elements of traditional Mexican music with rock and roll. Despite multiple lineup changes over the decades, Sir Douglas Quintet's impact on Tex-Mex music and their unique combination of musical elements remain significant in music history.