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 part of The Actors’ Gang theatre company at the time. The duo’s name is derived from “tenacious defence” – a phrase used by NBA basketball sportscaster Marv Albert.
The duo met at an acting class and began playing together in 1994, making their live debut later that year a bar, playing just one number : “Tribute”
In 2006, they starred in, and recorded the soundtrack for, the film Tenacious D in The Pick of Destiny.