READ MORE: Elvis: Father Vernon revealed that 'Everybody rejected him at the start'Ann-Margret was already an acclaimed singer and dancer by the time she was cast in 1964's Viva Las Vegas, having caused a worldwide sensation in the 1963 film Bye, Bye, Birdie.
She said: "We experienced music in the same visceral way. Music ignited a fiery pent-up passion inside Elvis and inside me. It was an odd, embarrassing, funny, inspiring, and wonderful sensation. "We looked at each other move and saw virtual mirror images.
When Elvis thrust his pelvis, mine slammed forward, too. When his shoulder dropped, I was down there with him. When he whirled, I was already on my heel.
Read more on msn.com