This Is Spinal Tap is a 1984 American mockumentary film co-written and directed by Rob Reiner. The film stars Christopher Guest, Michael McKean and Harry Shearer as members of the heavy metal band Spinal Tap, who are characterized as "one of England's loudest bands". Reiner plays Martin "Marty" Di Bergi, a documentary filmmaker who follows them on their American tour. The film satirizes the behavior and musical pretensions of rock bands and the perceived hagiographic tendencies of rock documentaries such as The Song Remains the Same (1976) and The Last Waltz (1978), and follows the similar All You Need Is Cash (1978) by the Rutles. Most of its dialogue was improvised and dozens of hours were filmed.

The Rutles were a rock band that performed visual and aural pastiches and parodies of the Beatles. This originally fictional band, created by Eric Idle and Neil Innes for a sketch in Idle's mid-1970s BBC television comedy series Rutland Weekend Television, later toured and recorded, releasing two studio albums and garnering two UK chart hits. The band toured again from 2002 until Innes' death in 2019.