The backing band consists of electric guitarist John Konesky, bassist Jason Keene, and drummer Tim Spier.

[2] Gass and Jack Black formed the band Tenacious D in 1994 whilst they were members of The Actors' Gang theater company in Los Angeles.

Black's popularity as an actor began to increase in the early 2000s, with appearances in films such as High Fidelity, Saving Silverman and Shallow Hal.

After doing some shows in the Pacific Northwest opening for Trainwreck in 2009 and '10, Gass noticed talent in Bray, and invited him to be the lead vocalist.

[4] The drumming position in the band was originally filled by Trainwreck's Nate Rothacker until mid-2013, it was then given to Jamie Douglass in late-2013 and then Tim Spier in mid-2014.