One of the most important aspects of filmmaking is creating believable characters that an audience can connect with. Strong characters grab people and force them to invest a little bit of themselves into the movie.
So when you decide to make a movie about a band -- or at least angle to have that band play an integral role in it -- then you'd better make sure they come off as a believable group.
And if the real music that fictional band composes is complete garbage, then you might as well hand everyone who pays to see the movie a Hootie & The Blowfish CD and send them on home, because at least then their vanilla listening experience would come with a coaster.
Luckily for movie buffs and music aficionados alike, there have been plenty of pretend bands that have churned out some excellent, bona fide songs that were captured on film.
As a note, we're going to focus solely on bands that were created explicitly for a movie or TV series. not those who started as actual bands prior to landing a televised gig. (Sorry Tenacious D and Flight of the Conchords fans.) Though some of these bands went on to achieve wider acclaim outside of their fictional universes, as well.