Producer David Benioff wanted the theme song to be the Lannister song "The Rains of Castamere." Co-producer D.B. Weiss convinced him not to do it. And we're more than glad because the current theme song is absolutely iconic. Also, "The Rains" weren't exactly pushed to the side either, as the melody plays in many episodes, as well as performed by Icelandic avant-rock band, Sigur Rós, who had the fortune (or misfortune) to perform for King Joffrey during the Purple Wedding.