While filming this movie, Kristen Stewart cut her trademark long, full hair into an uneven 'shag' hairstyle. Photos of the hairstyle were released on June 11, 2009, garnering a great deal of media attention.
A New York Times review of the film quotes Joan Jett as saying that when she listened to the first tape of Kristen Stewart singing one of her songs, she thought it was a mistake and that it was actually her.
The Dodge Charger shown at the beginning of the movie has a license plate beginning with the number 3 (which was not issued until several years later).
Kristen Stewart, as Joan Jett, wears leather pants throughout the movie. On the commentary track featuring the real Joan Jett, Joan says she never wore leather pants but only wore jeans throughout her career.
When Cherie calls her sister Marie from a telephone both, she inserts coins before she has even lifted receiver, then dials; call would never go through unless she had lifted receiver first.