On the surface, Viva Las Vegas is a breezy 85-minute musical, but inside it lives an untidy love story that never truly ended. Elvis, already tied to Priscilla, found in Ann-Margret a mirror: shy offstage, electric under the lights, fiercely loyal to family and faith. Their chemistry was so real it threatened to swallow the film whole, sparking tension with director George Sidney and prompting Colonel Parker’s reminder that this was “an Elvis Presley picture.”

Yet the camera captured what contracts and managers could not contain: a man and woman falling for each other in real time. The taped fingers, the resurrected race car driver, the background dancers and future stars are charming trivia, but the real legacy is emotional. Years later, when the guitar-shaped flowers stopped arriving in her Vegas dressing room, Ann-Margret understood. She went to Graceland to say goodbye, carrying a love story the film only hinted at.