Petra Collins is a Toronto based photographer and only ninteen-years-old. She takes beautiful snapshots of girlhood. Her work has appeared in magazines like Oyster, Garage, Vice, and, of course, Rookie Mag. Her photos of teenage girls, whether they're of a group of witches or a couple of riot grrrl skateboarders, have helped define Rookie's aesthetic month after month. She also runs The Ardorous, an all-female art collective that features photographers, painters, and illustrators from around the world.