A documentary sequel to Elton John’s 2019 biopic Rocketman is reportedly in the works, with plans to release on Netflix.

According to sources, the follow-up to the film would feature behind-the-scenes footage that failed to make the original biopic's final cut.

Reportedly titled The Pillars Of Hercules, the documentary is set to cover John’s tours across the 1970s, and would include footage of the singer and John Lennon.

It has been the passion project of Elton John’s guitarist Davey Johnstone for numerous years.

The source told The Sun that the film would tell stories "within the Elton John Band which weren’t shown in the biopic” and confirms that “Davey has Elton and his husband David Furnish’s seal of approval”.

Discussing the new project on the Greatest Music Of All Time podcast, Johnstone said:

“I had a lovely conversation with David Furnish the other day in which they were really happy that I was going ahead and doing it again.

“Quite honestly I would never do anything, especially of a documentary nature, about anything we did without them being OK with it. So with this documentary we are in the throes right now of putting together all the last things we need."

Regarding a potential release date for The Pillars of Hercules, he added:

“There are two more interviews we are looking to get and we will probably be finished with all the recording by late January and then we will go into editing and we will be ready about Easter.”

“There has been a lot of interest from various ­sources,” he said of its eventual release.

“The show will ­feature John Lennon on the night he came on stage and played Madison Square ­Garden with us for Thanksgiving in New York in 1974.”