The Crocodile Rock singer, 69, is partnering with publishing house Pan MACmillan for the book, his first memoir.

Elton is writing the autobiography, which is billed as a "no holds barred" account of his life, with music journalist Alexis Petridis. It is scheduled to be released in 2019.

"As I look back, I realise what a crazy life I have had the extreme privilege of living," Elton said in a statement. "I have grown up in a period of extraordinary change in our world - and have had the joyful honour of rubbing shoulders and working with so many of the people at the heart of these changes.

"My life has been one helluva rollercoaster ride and it's still lumbering on. I hope readers will enjoy the ride too."

The musician rose to fame in the late 1960s, with hits like Tiny Dancer, Rocket Man and Your Song making him one of Britain's most popular performers.

From the late 1970s until checking into rehab in 1990 and getting clean, Elton battled drug and alcohol addiction, experiences he has later used to counsel a new generation of stars.

He has also become one of the gay community's most visible figures, and raised millions for his Elton John AIDS Foundation.

An incredible life has also seen him own London soccer club Watford FC and perform at the funeral of his friend, British royal Princess Diana, in 1997.

For the sad occasion he reworked his 1973 hit Candle in the Wind to contain lyrics about Diana, who died aged 36 after a car accident. The new version is the second biggest selling single of all time.

"I'm not prone to being a nostalgic person," Elton says of finally putting pen to paper. "I'm often accused of only looking forward to my next gig or creative project. It's come as quite a surprise how cathartic I am finding the process of writing my memoirs."