The film, 'Rocketman', is based on Elton's life with Tom Hardy portraying the 67 year old as he battles his demons in rehab.
The writer of the film, Lee Hall, claims the singer handed him the personal diaries himself.
Sir Elton went to rehab in the 1990s with alcohol and drug issues.
Elton hasn't edited any of the script allowing for his journals to speak for themselves to show the terrors of addiction.
