This weekend, the Javits Center became a mecca for cosplayers, cartoon-lovers, and comic book aficionados from all over the world. New York Comic Con is always a big deal for East Coast nerds, fanboys and girls alike, and with panels from the cast of Gotham to Game of Thrones, what's not to love? Even celebrities like Jared Leto and Mark Ruffalo couldn't help but go incognito in order to take part in the action. Missed it? Click through for the best Insta moments from NYCC 2015!