As Elvis Presley entered the seventies, he was on top of the world. His 1968 comeback special had been a huge hit, while he went on to sell out his Las Vegas residency shows. This year marks the 50th anniversary of Elvis: That’s The Way It Is, the documentary film about The King’s third residency at the International Hotel, when he was a his peak.
Speaking exclusively with Express.co.uk, author of a new book on the film David English said: “In every fan’s mind, it’s Elvis at his peak.
“The world was his oyster here.
“He couldn’t do a thing wrong at that particular point.
“He really looked good and his voice was in good shape.”
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Elvis was married to Priscilla from 1967-1973
And yet, over the course of the next few years, Elvis would balloon in weight and struggle with a prescription drug addiction.
Then in August 1977, he died of a heart attack at the age of just 42.
So where did it all go wrong for The King of Rock and Roll, when he was doing so well at the start of the decade?
Well now English has revealed the turning point was really after he and Priscilla Presley separated in 1972, before their divorce a year later.
Elvis performing in Aloha from Hawaii in January 1973
Elvis’ grave at Graceland
The Elvis expert said: “You can slightly see [his decline] in the following year  but really after he got divorced.
“So after Madison Square Garden, you start to see slight physical decline.
“He still looked good at Madison Square Garden.”
But it was after Aloha from Hawaii Via Satellite in January 1973 – the month The King filed for divorce – that the decline towards his death really hit.
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English added: “From that point onwards you can see a steady decline in both his musical aspirations and interests and his physical state.
“Just gradually going downhill, in quite a short time actually. Only four years.”
Elvis died on the toilet upstairs at his home of Graceland on August 16, 1977.
And while fans can visit The King’s home and grave to this day, his private area above the ground floor is off-limits.
Nevertheless, Elvis’ daughter Lisa Marie, who owns Graceland, requires that it be preserved just as her father left it.
Director of Archives Angie Marchese, who is allowed upstairs, said in an Instagram Live Q&A earlier this year: “It looks as if he just got up and left. It is part of my job to maintain it.
“So we do go up there to maintain the space. The record on the record player is the last record he listened to.There’s a styrofoam cup that sits on a bookshelf.”
While on the bedroom, the archivist added: “The bed is made, so we really maintain it the way that Lisa wants us to preserve it.”