- Liam Aiken was the original candidate to play Will, but at this time he just happened to be admitted to the School of Film and Television Arts at New York University, and he had to pass up the opportunity in order to study.
- Vanessa Anne Hudgens' character in the film is called Sa5m, and the 5 is silent, so the name means "silent number 5".
- The high school campus scenes in the film were actually shot at Austin School for the Deaf, A.N. McCallum High School, and the Academy of Fine Arts, which are only a few blocks apart.
- Of the several high school students who played in the film who formed a band, only Charlie Sexton was still in high school at the time of filming and had his own band.
- Charlie Sexton was called in for an audition on his birthday, and the graduation scene was from his actual graduation ceremony.
- In the original script, the band's name was not "Honor Dogs", but "River Dogs". The reason the screenwriter changed it this way is that in real life, there is a rock band called "River Dogs".
- Vanessa Anne Hudgens initially wanted to play the role of Charlotte, and also planned that if she was asked to play Sa5m, she would decline an offer from the cast.
- gaelan connell had two weeks of musical training before shooting the film, and some intensive training before shooting some of the big scenes.
- Cody Leylin was originally cast to play Ben Whateley, but the role was later given to Scott Porter.
- The film marks the first time Tim Jo and Ivy Yost have starred in a feature-length Movie.
- The character Elaine Raman turned out to be a male character named Ella Raman. But at the audition scene, Ivy Yost's performance impressed director Todd Graff, who then rewrote the script for Yost.
- The character Sam has to play the guitar in the film. In reality, Vanessa is best at playing the piano, but she is not very proficient in the guitar. For the needs of the plot, she specially learned to play the guitar .
Bandslam behind the scenes gags
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Sa5m: Emotion is... overrated.
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Sa5m: Well, if you were just part of Charlotte's experiment this whole time, then, what is reality? What if Charlotte and her experiment are really a part of someone else's larger experiment? I mean, what if we're being manipulated by some greater intelligence than our own? And if so, is there really such a thing as free will? Am I moving my hand or was it predetermined by a force I'm not even aware of? Charlotte times a trillion.f you were just part of Charlotte's experiment this whole time, then, what is reality? What if Charlotte and her experiment are really a part of someone else's larger experiment? I mean, what if we're being manipulated by some greater intelligence than our own? And if so, is there really such a thing as free will? Am I moving my hand, or was it predetermined by a force I'm not even aware of? Charlotte times a trillion.
Bug: See, this is why you don't have friends!