For the release of the third season soundtrack, the label was changed from Varèse Sarabande to Watertower Music. The album's initial release was digital-only, with a physical release to follow several weeks later.
Kerry Ingram, who plays Princess Shireen Baratheon, sings the track for It's Always Summer Under the Sea. Her character sang it within Season 3's fifth episode, "Kissed by Fire", and then Ingram's cover of the song played over the episode's end credits. Ingram is a child star in musical theater, having played "Matilda" in Matilda the Musical.