Dennis Carl Wilson was an American musician who co-founded the Beach Boys. He is best remembered as their drummer and as the middle brother of bandmates Brian and Carl Wilson. Dennis was the only true surfer in the Beach Boys, and his personal life exemplified the "California Myth" that the band's early songs often celebrated. He was also known for his association with the Manson Family and for co-starring in the 1971 film Two-Lane Blacktop.

The Beach Boys are an American rock band formed in Hawthorne, California, in 1961. The group's original lineup consisted of brothers Brian, Dennis, and Carl Wilson, their cousin Mike Love, and friend Al Jardine. Distinguished by their vocal harmonies, adolescent-oriented lyrics, and musical ingenuity, they are one of the most influential acts of the rock era. They drew on the music of older pop vocal groups, 1950s rock and roll, and black R&B to create their unique sound. Under Brian's direction, they often incorporated classical or jazz elements and unconventional recording techniques in innovative ways.