Tenacious D is the debut studio album by American comedy rock band Tenacious D, released on September 25, 2001 by Epic Records. The album's polished production was a departure from the band's acoustic origins, due in part to the production of the Dust Brothers. "Wonderboy" was the first single released from the album, followed by "Tribute". Both singles had music videos filmed for them, with the Liam Lynch-directed "Tribute" video achieving cult status. While Tenacious D did not achieve chart success after its release, it was certified platinum by the Recording Industry Association of America (RIAA) by the end of 2005. Despite only peaking at number 38 in the UK, it had sold 426,000 copies countrywide by 2006.

Tenacious D is an American comedy rock duo formed in Los Angeles, California, in 1994. It was founded by actors Jack Black and Kyle Gass, who were members of The Actors' Gang theater company at the time. The duo's name is derived from "tenacious defense", a phrase used by NBA basketball sportscasters Walt Frazier and Marv Albert. Backing members include John Konesky, John Spiker, and Scott Seiver. As a sort of a partial member, Dave Grohl has also recorded drums and percussion on all studio albums, but does not perform live.