New York Comic-Con took place over the weekend, but we're still celebrating all the geeky fun. Both celebrities and cosplayers are a common sight at the event (as well as Summer's gigantic San Diego convention), and sometimes the two collide when a star decides to channel a famous character — be they a famous figure in geek culture or a character that they've played themselves. Mark Ruffalo and Jared Leto are the latest to trick fans with clever masks. Keep scrolling to see all the celebrities who not only showed up but dressed up!
— Additional reporting by Maria Mercedes Lara and Maggie Pehanick