Jennifer Beals' trend-setting collarless sweatshirt came about by accident. The sweatshirt, which Beals brought from home, had shrunk in the wash and she had to cut the collar off in order to get it over her head.
Marine Jahan was Jennifer Beals' body double for the dancing scenes. Jahan was kept hidden from the press because the filmmakers did not want to ruin the illusion. Alex's leap through the air in the audition scene was done by gymnast Sharon Shapiro and the break-dancing was done by Crazy Legs. Jahan appeared in the music video for "Maniac".
Actually, Adrian Lyne and talent scouts had narrowed the female leads down to four women which included Beals. They each had their favorite one and could not decide. Lyne brought in a few secretaries from the front office and had them choose. This is straight from Lynes' interview in the 2007 Blue Ray copy. Oddly enough, Beals does not appear in the biography of the film.
In the early years of home video, Paramount tried an experiment in which this film was given a heavily promoted home video release while the film was still playing in some cinemas. The box office was expected to drop off to nothing as soon as the tape became available for rental. Instead, the heavy promotion caused an increase in box office receipts.
Paramount Pictures gave production rights to the original script for the film to Don Simpson after he was fired from his executive job with the studio, and many observers felt Paramount deliberately gave him a terrible property in hopes he would fail and his career would be ruined. In addition, Paramount had so little faith in the box office potential of the film that they sold off 25% of the project days before it opened.
Director Adrian Lyne decided that Alex's back story included her having been molested when she was a child. Screenwriter Joe Eszterhas was horrified, saying it would "sink the entire story", and fought furiously with Lyne. The producers later sided with Eszterhas and Lyne gave up on the idea.
The role of Alex Owens was originally offered to Melanie Griffith, who turned it down. Executives at Paramount Pictures wanted an unknown for the part. A nationwide search for a young actress was narrowed down to three finalists: Leslie Wing, Demi Moore, and Jennifer Beals. Reportedly, a Paramount executive took pictures of the three actresses to a group of construction workers on the studio lot, asking them "Which of these women do you most want to fuck?" and being given the answer "Jennifer Beals".
Before Kyra Sedgwick auditioned for a role here, she was instructed by her agent to wear a leotard, heels and no tights. She wore, instead, a miniskirt and heels and auditioned for director Adrian Lyne whom she berated when he took a call during her audition.
Earlier drafts of the screenplay included Alex having a gay man for a best friend. Director Adrian Lyne liked this story because it was rare at that time for films to show straight women having close friendships with gay men. But the storyline was cut from the final script.
According to his autobiography "Is That It?" Bob Geldof was offered a role in this film, after director Adrian Lyne was impressed by his performance in Pink Floyd The Wall (1982). Geldof turned it down.