POP superstar George Michael has died at home from suspected heart failure.

The 53-year-old, who was set to release a documentary in 2017, rose to fame as a member of Wham!, known for their hits Wham Rap!, Club Tropicana and Last Christmas.

Michael - whose real name is Georgios Kyriacos Panayiotou - sold more than 100 million albums throughout a career spanning almost four decades.

Michael was the biggest pop star in this country through most of the 1980s and 90s.

In a statement, the star's publicist said: "It is with great sadness that we can confirm our beloved son, brother and friend George passed away peacefully at home over the Christmas period.

"The family would ask that their privacy be respected at this difficult and emotional time. There will be no further comment at this stage."

Sir Elton John posted a photograph of himself and Michael on Instagram, writing: "I am in deep shock. I have lost a beloved friend - the kindest, most generous soul and a brilliant artist. My heart goes out to his family and all of his fans."

Michael's former Wham! bandmate Andrew Ridgeley said he was "heartbroken at the loss of my beloved friend Yog", a nickname which refers to "Yours Only George".

He said: "Me, his loved ones, his friends, the world of music, the world at large. 4ever loved. A xx"

Friend Madonna paid her own tribute, posting an undated video on Twitter in which she embraced Michael on stage. In it she tells the audience: "He's a great songwriter and he makes very classy videos, like me."

Referencing several of his best known lyrics, she adds: "George, I want your sex, so be my father figure and I will have faith if we have to live hand-to-mouth. The diva himself."

Thames Valley Police and ambulance were called to his home in Goring-on-Thames yesterday afternoon. A spokesman said the death was "unexplained but not suspicious." a post-mortem will be held.

Michael nearly died from pneumonia in late 2011.

After receiving treatment in a Vienna hospital, he made a tearful appearance outside his London home and said it had been ''touch and go'' whether he lived.

Doctors had performed a tracheotomy to keep his airways open and he was unconscious for some of his spell in hospital.

Meanwhile, Michael's 1990 album Listen Without Prejudice Vol. 1 had been set to be reissued accompanied by a new film featuring Stevie Wonder, Elton John and the supermodels who starred in the video to his hit single Freedom! '90.

The movie, with the working title Freedom: George Michael, was to be narrated by Michael and set to feature Mark Ronson, Mary J Blige, Tony Bennett, Liam Gallagher, James Corden and Ricky Gervais.

The record was his second solo album, after the hugely successful Faith, and was arranged produced and almost entirely written by Michael, but did not feature him on the album cover.

It featured hits including Cowboys And Angels, Mother's Pride and Praying For Time and outsold Faith in the UK, where it went platinum four times but led to a court case with US record label Sony about Michael's frustration over how the album has been marketed. Michael lost the case.