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In the original Grimm fairy tale, Flynn Rider was a nameless prince, and Rapunzel wasn't a princess, but a peasant. While pregnant, her mother saw some rampion growing in a witch's garden and began craving it obsessively. Rapunzel's father stole the rampion, successfully the first time, but the second time he got caught and had to make a deal to give up his firstborn child. When the baby arrived, the witch appeared and took her away. She was named Rapunzel after the plant her mother had desperately hungered for. At age 12, the witch locked Rapunzel in a tower and was the only visitor for years until a prince happened by. Rapunzel fell for him during his secret visits, leading her to become pregnant. The witch discovered this when Rapunzel noticed that her dress was getting tight. She chopped Rapunzel's hair off and banished her to a desert, where she gave birth to twins. The prince arrived at the tower and was pulled up on Rapunzel's hair by the witch. She threw him down into a bed of thorns, blinding him. He wandered through the desert and eventually was reunited with Rapunzel, whose tears restored his sight, and they lived happily ever after.
Disney's previous animated feature The Princess and the Frog (2009), despite being popular with critics and audiences alike, was a box office disappointment. Disney felt that the film's princess theme discouraged young boys from seeing it. In an attempt to market the film to a broader audience, Disney changed the title of the film from Rapunzel to Tangled, and promoted it as a comedic adventure. An early trailer for the film focused less on Princess Rapunzel and more on Flynn Rider, the male lead character. It was originally believed that Disney's marketing campaign was a desperate attempt to search for a particular audience. However, directors Byron Howard and Nathan Greno claimed that the title change was to emphasize that Flynn has as much of a role in the film as Rapunzel.
Over 45,000 lanterns are used during the "I See the Light" sequence.
This is the first animated Disney "princess" film to get a PG rating by the MPAA. The previous Disney princess films up to that point were all rated G.
The most expensive Disney film in the animated canon, at US$260 million.
Zachary Levi auditioned for the part of Flynn Rider and got it, with an English accent. Later, this was dropped and Levi read the role in his own American accent instead.