Based on the size of his house, it would take 12,658,392 balloons to hoist Carl’s house off the ground. That’s a whole lotta helium. (Source)

Jordan Nagai, who voices Russell, had stiff competition for the role: namely, his older brother, Hunter. We hope all of the noogies and wet willies were worth it. (We’re pretty sure they were.) (Source)

Ever wonder how Muntz is still alive and kicking in the movie’s third act? Up originally contained a subplot where Kevin’s eggs could reverse the aging process. Ultimately, it was scrapped because director Pete Docter thought it was too crazypants, even for a movie about a flying house. (Source)

There was a real life Up house in Seattle. For years, Edith Macefield refused to sell her tiny farmhouse as skyscrapers shot up like weeds all around it. When she passed away in 2008, she left her house to one of the building’s developers. In 2015, it was announced that the house will be moved, but not torn down. Might we suggest Paradise Falls? (Source)