Many highly anticipated movies film using secret codenames or working titles.<br />Productions and studios try to shoot their films off the radar to avoid fans and the press.<br />Business Insider has compiled a list of popular movies that filmed under codenames.<br />Both "Avengers: Infinity War" and "Avengers: Endgame" were filmed under the codename "Mary Lou."<br />"Deadpool" was filmed under the fictional character's favorite band, "Wham!"<br />"Star Wars: The Last Jedi" was known internally as "Space Bear."<br />"Wonder Woman's" working title, "Nightingale," likely references the character's alias.<br />"Joker" filmed under the name "Romeo."<br />"The Avengers" went by the name "Group Hug."<br />"Captain America" had the title "Frostbite," which is funny given its ending.
