Bert Kaempfert's soundtrack for this movie features the introduction of his most famous composition, "Strangers in the Night," here still without lyrics but clearly recognizable. The accompanying soundtrack album listed it under the title "Beddy Bye".
T.E.B. Clarke's first version of the script retained the central character's nationality as British, but he was Americanized in the Richard L. Breen rewrites.
Sandra Dee did not want to make this film, as it would have to be shot on location in Europe which meant that she would have to spend months separated from her husband, Bobby Darin. She later said that this was when she realized that the Universal studio executives only viewed her as property. Shortly after, she was loaned to MGM as a punishment and completed one more film under her Universal contract, and then refused to renew it. She was Univeral's last contract player.