Random Trivia For This Title:
- If Carl's house was approximately 1600 square feet, and the average house weighs between 60-100 pounds per square foot, it weighs 120,000 pounds. If the average helium balloon can carry .009 pounds (or 4.63 grams), it would take 12,658,392 balloons to lift his house off the ground. (20,622 balloons appear on the house when it first lifts off.)
- Pete Docter, the director, provided most of Kevin's vocalizations.
- Film debut of Jordan Nagai, who voices Russell. Originally, his older brother Hunter was auditioning for the part, and Nagai simply came along with him. About 400 children had showed up for the auditions, but Nagai stood out because he would not stop talking. Director Pete Docter later said that "as soon as Jordan's voice came on we started smiling because he is appealing and innocent and cute and different from what I was initially thinking."
- Carl Fredricksen's face and gruff personality are based on [?] Spencer Tracy and Walter Matthau.
- Co-director/co-writer Bob Peterson stated that Dug's line "I have just met you, and I love you," was inspired by a quote from a small child that he met when he was a camp counselor in the 1980s.
- First film to be nominated for Academy Awards for both Best Picture and Best Animated Feature.
- Pixar is known (at least by devoted Pixar fans) for referring to a character in their next movie to come out in their most recent one. A stuffed Lotso bear (from Toy Story 3) appears (along with the ball from Luxo Jr. and the plane from Toy Story) in the room of a little girl Carl passes when his house first takes off.
- About halfway through the film, Carl and Russell are trying to put up a tent. Carl is surprised that Russell, with all his badges, never put up a tent before. When he asks Russell why he didn't ask his dad for help, Russell reveals (albeit indirectly) that his parents are divorced. This is the first time in a Disney full-length animated feature where divorce is even hinted as being a reason for a character having a single parent (Cody in The Rescuers Down Under, Andy in Toy Story but we are never told if the moms are divorced or widowed).
- Doug's 'point' pose, where his entire tail, back, and head is in a perfectly straight line, is an homage to the identical pose that Mickey's dog Pluto often makes. Doug also shares a similar color scheme to Pluto.
- When a younger Charles Muntz speaks to a large audience that he will return with the beast alive, everyone is wearing a hat. What the viewer can't see, however, is that he is speaking to a literal "Sea of Hats". There are no people under those hats (DVD director's commentary).
- The villain Charles Muntz is named after [?] Charles Mintz, the Universal Pictures executive who in 1928 stole Walt Disney's production rights to his highly-successful "Oswald the Lucky Rabbit" cartoon series. This led Walt Disney to create Mickey Mouse, who soon eclipsed Oswald in popularity.
- As per Pixar tradition, John Ratzenberger once again provides a voice in the movie, making him the only actor to do a voice in every Pixar film.