Rock 'n Roll
The movie chronicled the creation and early years of the all-girl band fronted by Joan and Cherie, and it was interesting watching them struggle for respect and recognition at a time (1975) when girls weren't exactly known for playing electric guitar and rockin' out.
I also loved the epilogue at the end that told us how Joan Jett, going solo post-Runaways, was rejected by 23 record labels before finally deciding to release her album herself. I'm sure we all remember how I Love Rock 'n Roll blew up the charts.
I don't pretend to be a movie critic, but I do love stories like this. And I've always loved Joan Jett. Her version of this oldie but goodie is one of my all-time faves: