Alice Cooper once found himself in a hotel penthouse holding a gun to Elvis Presley's head – with the King ordering him to pull the trigger.

The shock-rocker took a once-in-a-lifetime opportunity to meet one of his all-time heroes in 1971, but could never have imagined how it would pan out.

"Elvis took took me into the kitchen, opened a drawer, pulled out a loaded pistol and told me to put it to his head. I didn't know what to do. I was expecting one of his security men to come in any second, see me holding a gun and shoot me dead," Cooper tells the Mirror. "But a little voice in my ear was telling me, 'Go on – this is history. You'll always be the guy who killed Elvis.' In my other ear was a voice saying, 'You can't kill Elvis. Wound him and you'll only get a few years.'

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