Director William A. Graham said in an interview years after the making of this film that Elvis Presley was the nicest man he had ever met.
When Elvis is playing the piano and Mary Tyler Moore the guitar, the tune they're playing together is "Lawdy Miss Clawdy", a song that Elvis first recorded in 1956. It is the only recorded performance of this song that features Elvis on the piano.
The first film in the West to mention autism.
In a 1995 interview on the Terry Gross radio show, "Fresh Air", Mary Tyler Moore stated she was Elvis' last leading lady. She added that Elvis was quoted as saying there was only one leading lady he did not sleep with. Moore implied to Terry Gross that she was that one leading lady.