[3] The theatrical trailer released in July 2015 contained a rendition of John Barry's On Her Majesty's Secret Service theme.

[4][5] Mendes revealed that the final film would have more than one hundred minutes of music.

[6] London Voices provided the choral element to the soundtrack, most noticeably in "Backfire".

In September 2015 it was announced that Sam Smith and regular collaborator Jimmy Napes had written the film's title theme, "Writing's on the Wall", with Smith performing it for the film.

[7] The song was released later that month where it received mixed reviews from critics and fans, particularly in comparison to Adele's "Skyfall".