The 3rd Armored Division was Elvis's division when he was in the army and in this movie.

Despite the European locale, all of Presley's scenes were filmed in Hollywood.

While filming on the sky lift in Rüdesheim, director of photography Loyal Griggs fell out of a tram car, plunging thirty feet to the vineyards below, but was not seriously injured.

All of the main cast scenes were filmed in Hollywood on indoor sets, in front of process screens, and on backlots. Location and exterior shots were filmed in Germany, but they used stand-ins and were intercut with the process-screen shots.

Princess of Denmark, Norway and Sweden, King of Thailand and other royalties visited on the studio and met Elvis Presley.

While Tulsa (Elvis Presley) is singing "Doin' the Best I Can", one soldier puts a coin in the jukebox and choose from the list "Blue Suede Shoes - Elvis Presley".

According to the Hal B. Wallis papers at the AMPAS Library, Michael Curtiz was originally set to direct the film. Curtiz directed Elvis Presley in King Creole (1958), his previous picture.

The song "Pocketful Of Rainbows", seemingly a duet with Elvis and Juliet Prowse, had Prowse lip-syncing to an unknown backup singer's vocals.

The "sneak preview" was in Dallas, Texas, on Thursday, August 18th, 1960.

This would be the only movie role where Elvis would sing one of his established million selling oldies. ("Blue Suede Shoes" from 1956)

The boat Elvis boards ("Bonn"), is now in Karlshamn, southern Sweden, and is used as a discotheque.

Ursula Andress tested for the role of Lili which eventually went to Juliet Prowse. Also May Britt and Elke Sommer were considered for the role.

According to the Hal B. Wallis papers at the AMPAS Library, Frank Gorshin tested for the role of Cookie and both Russ Tamblyn and Johnny Carson were considered but the filmmakers decided to go with an older actor who could be a "breezy conniver with the girls" in order for the character to be portrayed successfully.

The working title for this movie, "Café Europa", is also the title by which the movie is known in a number of European countries (Germany and Italy amongst others).

Anna Maria Alberghetti was originally set for the role of Tina which went to Letícia Román.

This film marked the beginning of actor and director collaborations between Elvis Presley and director Norman Taurog. They would work together eight more times throughout their respective careers.

The songwriting team of Jerry Leiber and Mike Stoller wrote two song for the movie, "Dog Face" and "Tulsa's Blues", but later withdrew the songs when they didn't like the royalty payments contract that Elvis' manager Col. Tom Parker insisted that they sign.

Generally regarded as the film that set the mold for every Elvis Presley musical to follow. Indeed, within the first 30 minutes, Presley is established as a scheming, fun-loving ladykiller, meets a hard-to-get leading lady whose ice doesn't melt in response to charm, and sings two songs in a bar setting, escalating into a fistfight in which he and his buddies wreck the joint.

Jan Shepard's baby was offered for the role of little baby on the film.

The song "Wooden Heart" is a cover version of the famous German folk song "Muss i denn zum Städtele hinaus" (Must I then go away to the town), of which Elvis Presley also sang a few lines in his version. The song was first released in the 1830s. Elvis Presley's version was a big hit in Germany and about 400 000 records were sold within a few weeks. However The Bavarian Radio broadcast and the Westberlin-radio broadcast were boycotting this version due to "deliberated Schmultzyness of German folk songs" and because the stations wanted to broadcast serious folk music.

This film marked a turning point in Elvis Presley's screen persona. Up until his stint in the U.S. Army, art imitated life, with Presley typically cast as a shy, unassuming country boy. Following his release from the armed services, Presley kicked off the hayseed, emerging as a slick, articulate bon vivant. He would occasionally mix the two personas, as in Wild in the Country (1961), but for the most part, Presley would veer toward the hip side for the rest of his career. That said, Presley's inability to obscure his drawl dictated that most of his characters came from the south.

Pier Angeli mentioned for one of female leads.

The white convertible sports car in which Lili drives Tulsa to the riverfront is a 1956 Mercedes-Benz 190 SL.

The group of children singing included the grimes girls, Gloria, Angela, and Victoria Grimes. Daughters of silent film actress Theo-Alice Jeanne Carpenter

The song "Tonight is so right for love" is based on the aria "Barcarole" by Jacques OFfenbach from his opera "The mermaids of the Rhine" from 1864. Due to copyright issues in Europe an alternative version was released based on "Geschichten aus dem Wiederwald" by Johann Strauß.

Juliet Prowse made this film on the heels of Can-Can (1960), which brought her good personal notices despite generally derisive reviews. Buoyed by this, Paramount borrowed Prowse from Fox, but the film did not lead to Hollywood stardom, and she finished out her Fox contact with secondary roles in three minor films before turning to stage and nightclub work.

The first of Elvis Presley's films to add the trademark 'echo chamber' reverb to his vocals, the production team making no attempt to disguise the studio origin of the prerecordings, even when outdoors.

Juliet Prowse did not reveal herself to be a singer until after she left Hollywood for the stage, where she triumphed as the triple-threat star of the London production of "Sweet Charity." Her musical presentation in G.I. Blues (1960) was limited to the nightclub floor, where she was given two indifferently choreographed dance numbers that made scant use of her considerable talents.

The plot was fashioned after the classic 'three servicemen on leave' motif that had fueled many musicals during wartime. As such, the film gives a generous amount of screen time to the romantic exploits of Tulsa's best friends, Cookie (Robert Ivers) and Rick (James Douglas). This would quickly change as Elvis Presley moved forward in his film career. Following G.I. Blues (1960), Elvis would be portrayed as more of a loner, and any sidelick activity in his films would be limited to backup vocals and/or plot device exposition.

Sigrid Maier's only documented film appearance.

Carleton Carpenter was originally cast as Cookie but was replaced by Robert Ivers.

The number of the sky lift Tulsa and Lili ride on is 76.

This film marked the first collaboration between Elvis Presley and Norman Taurog.

Rick (James Douglas) and Marla's (Sigrid Maier) child is revealed to have been illegitimate when Rick tells Tulsa (Elvis Presley) that Marla ran out on him with a baby on the way, despite the fact that he "already had a license to marry" her. This was a daring plot device in 1960, which is generally regarded as the year the Hollywood Production Code began to crack.

At the film's conclusion, Elvis Presley breaks the fourth wall to deliver his final line to the audience.