50th grossing film in USA of 1967.
Elvis' co-star from Paradise, Hawaiian Style was offered a role in this film, but according to her interview made in 1998, she turned down the offer and said Tom Parker (Elvis' manager) was one of the reasons why she did so.
Final film of Frank McHugh.
The ship Elvis is on in the first part of the movie is the USS GALLANT (MSO-489), an ocean-going minesweeper.