Trivia: The phone number on Mirage's business card is 866-787-7476. The last 7 digits spell out S-U-P-R-H-R-O on a phone touch pad.
Trivia: Other supers from the movie that mimic comic book heroes (disregarding gender): Psycwave is Professor X, Phylange is Banshee, Blazestone is Pyro, Thunderhead is Storm, Gazerbeam is Cyclops, Apogee is Sunspot, and Gamma Jack is Ultraverse's Atom Bob. Jack-Jack also briefly manifests the powers of the Human Torch and the Incredible Hulk and the board that Frozone uses near the end is reminiscent of the Silver Surfer.
Trivia: In the "Jack-Jack Attack" special DVD feature, look closely at the aftermath of Jack-Jack's transformations when the chairs are turned over and burnt. In one of the shots is the rubber ball from Luxo Jr.
Trivia: The film's creators originally couldn't find an appropriate actress to voice Edna. Finally, when asking actress Lily Tomlin to voice Edna, Brad Bird provided an example of what she should sound like. Tomlin told Bird that he had nailed the voice well, and said that Brad should do the voice himself.
Trivia: Originally, an old man named Snug Porter was going to fly the plane that Helen flew to Syndrome's HQ. In the first script the favor she called in for was for him to fly her to HQ, not just lend her a plane. When the explosion blew up the plane it was implied that he didn't survive. They cut the scene because they couldn't give him enough screen time to make the audience sad when he died. You see one shot of him when Elastigirl picks up the photo while she is on the phone. He is also in the background of the wedding scene. The entire cut sequence can be seen in its basic storyboard form on the DVD extras.