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).
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.
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, 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 a "breezy conniver with the girls" in order for the character to be portrayed successfully.
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.