Besides being BBC One's featured "One to Watch" programme of the day, "Planet Earth" was heavily trailed on the BBC's television and radio channels both before and during its run. The music that was featured in the BBC trailers for the series is the track "Hoppípolla" from the album "Takk..." by Icelandic post-rock band Sigur Rós. Following the advertisements, interest was so widespread that the single was re-released. In the United States, the series was promoted using "The Time Has Come" from trailer music company Epic Score, composed by Gabriel Shadid and Tobias Marberger. The Australian trailers initially used "Jupiter: The Bringer of Jollity" from Gustav Holst's orchestral suite "The Planets", but later reverted to "Hoppípolla".