Jackson's This Is It to release in October

London: A new and never-heard-before Michael Jackson track titled This Is It is set to be released as a single on October 12.

The number will also be on the soundtrack album for the upcoming King of Pop documentary of the same name, which is due to be released on October 27, the Sun online reported.

The two-disc set will feature Jackson's biggest hits in the sequence in which they appear in film, along with two versions of This Is It. The new track will be played over the film's end credits.

There will be two version of the tune which will appear on the soundtrack album to the film.

"The second disc will include previously unreleased versions of some of Michael's biggest hits. It'll also included a never-before-heard spoken word poem by Jackson, titled Planet Earth, the newspaper said.

The This Is It album will also feature a 36-page booklet featuring exclusive photos of Jackson's last rehearsals for what would have been his sell-out 50-date stint in London's 02 Arena.

The pop icon died on June 25 at the age of 50, just weeks before his comeback concerts.