Mackenzie saw a screening of The Diary of a Teenage Girl while we were at Sundance. It’s the coming of age story of a 15 year old girl in 1970s San Francisco who just wants to have sex… a lot!br br The movie marks Marielle Heller’s directorial debut in addition to earning her first writing credit for adapting Phoebe Gloeckner’s graphic novel. Big names like Kristin Wiig and Alexander Skarsgard support breakout star Bel Powley.