Derek Smalls is a fictional character from the mockumentary film This Is Spinal Tap, which was released in 1984. He is the bassist for the fictional rock band Spinal Tap, known for its humorous portrayal of the music industry. Smalls is characterized by his distinctive hairstyle and often deadpan demeanor, contributing to the film's comedic elements. In the film, Derek Smalls is portrayed by actor Harry Shearer, who also provides the voice for several characters in the animated series The Simpsons. Smalls' experiences in the band highlight the absurdities of rock stardom, making him a memorable figure in comedy and music culture.