Up Trivia Questions

Young Ellie was voiced by Elie Docter, the daughter of director Pete Docter.

Muntz is fictional, but he was partly inspired by real aviator and explorer Howard Hughes, and the lost explorer Percy Fawcett. No real person exactly matches Muntz's story of a giant bird hunt.

Paradise Falls is based on Angel Falls in Venezuela, the world's highest uninterrupted waterfall. Pixar artists visited it for reference to capture the jungle and tepui landscape.

Russell was present from early story development. Director Pete Docter wanted a child character to contrast with Carl's grumpiness and drive the emotional arc, not just for marketing.

Pixar used Edith Macefield's Victorian-era house in Seattle's Ballard neighborhood as inspiration. The house was moved to a new location in 2015 to save it from demolition, similar to Carl's flying house.

Dug's name was never changed for trademark reasons. However, in some international releases, the name was modified slightly for phonetic or cultural reasons, but not due to legal conflicts.

Pixar artists estimated 20,000 to 30,000 balloons for the lift. Real calculations by engineers suggest it would take over 100 million standard party balloons to lift a house, so 10,000 is far too few.

Early drafts depicted Ellie's pregnancy and subsequent miscarriage, but director Pete Docter cut it to keep the montage bittersweet yet family-friendly, relying on subtext instead.