Although this film was set in Miami, Florida, Elvis Presley's scenes were all shot in and around Los Angeles, California. All the Florida exteriors were shot in wide angles, using doubles and look-alike impersonators for Presley.

Elvis' red sports car in the film is a one-of-a-kind 1959 Chevrolet Corvette XP-87 Stingray concept car. Originally silver in color, this car was the design inspiration for the "C2" generation of Corvettes (1963 - 1967), which took the name "Stingray" from this vehicle. The Stingray was modified for the film (in addition to the red paint, a hood scoop was added). Since filming, the car has been restored to its original condition and color, and is a museum piece worth several million dollars.

While shooting this film, Elvis suffered a serious fall in his bathroom at home, tripping over an electrical cord and striking his head on the porcelain edge of a bathtub. The resultant injury was serious enough that Presley lay unconscious for an unknown length of time, and was briefly hospitalized. The pain-killers he was prescribed to relieve the massive headaches and other effects of his injuries began the drug dependency that was partially blamed for his death a decade later.

Elvis Presley had so much debt in early 1967, due to his purchase of a Memphis ranch with up-to-date equipment, that his manager, Colonel Tom Parker, had to sign the contract for this movie in a hurry so that Elvis could get his one million dollar fee. This was the last time Elvis would get the magic million dollars.

According to unsubstantiated claims, Elvis Presley said that this movie was his least liked movie that he acted in, and his all-time favorite was King Creole (1958).

Continuity

Despite all the signs for the family-owned gas stations saying "Heyward", at the end of the movie when the real Scott shows Diane his driver's license, the last name is spelled "Hayward".

The registration number of Elvis' ski boat (FL 1128 AE) changes between the wide and the close-up shots.

In the closeups the carburetors on the "Rawhide" boat have vertical velocity stacks, while during the race, in the long shots, the carbs have horizontal scoops angled off to the side.

During the "Who Needs Money" song, the ships in the background are first pointed to the right, and in the next shot are pointed to the left.

In Scott and Dianne's first ski scene together, the stunt double for Shelley Fabares has hair that is less than a third as long.



Factual errors

As Scott drives along the highway at the end of the movie, he reveals his true identity and shows his driver license. As he shows evidence of his true name, his eyes are listed as brown (brn) when they are bright blue.

At the beginning of the movie Elvis is driving a red convertible and entering Florida. The sign says "Welcome to Florida, the Happy State". Florida is the Sunshine State.

The small sailboat in the boat shop has a registration of CF 0258 ML which is a California registration number. Florida has had a 30-day registration period for boats from out-of-state for many years and Florida vessels have an FL identifier.

In the campfire scene, Scott takes out his guitar and proceeds to serenade Dianne. A combo of instruments kicks in, but no guitar sounds are present anywhere.



Revealing mistakes

Elvis plays an electric guitar during the song "Clambake", but it is not plugged into an amp.

Just before Scott punches James near the end of the film in the hotel, Scott's hair bangs are parted, then one instant later they are very solid.

Diane's feet are dirty in the first water ski sequence.



Miscellaneous

At the end of the movie, Scott's operator's license does not list a town or city for his address, just a street and Texas. It also says he is 6 feet 2 inches tall. Elvis was just 6 feet tall.



Anachronisms

When Sam Burton is talking to Scott next to the damaged boat, he said "I always missed NOT having a son", which implies he has a son and is not happy about it. He likely meant to say "regretted" instead of "missed" or "I always missed having a son".



Errors in geography

While Scott is driving in Miami, mountains are visible in the background.

While Scott (who had been pretending to be Tom) and Dianne are driving in Miami at the end of the movie, Scott points to an oil field full of operating oil wells. There are no oil wells in Miami .

Several evening scenes show the sun setting over the water. This would not happen in Miami, which is on the East Coast.



Character error

During the boat race, there is a little boy sitting right behind Mr. Hayward who is pretending (not very well) to eat a hot dog.