The Dan Cushman novel on which this film was based had previously served as the basis for the 1958 Broadway musical "Whoop-Up," which starred Ralph Young in the Presley role.
Quentin Dean, who plays Joan Blondell's promiscuous daughter here, is best remembered for playing a similar role in the 1967 Best Picture winner, In the Heat of the Night.
During the fight scene at the party, Elvis Presley goes outside to tell the band to play something slow. He and his friend Charlie Hodge, who has a bit role in the film as a guitar player in the band, start cracking up during Elvis' line. Charlie later said the reason for the laughter was that it was cold outside and Elvis' nose was running.
65th highest grossing film in the US of 1968.