1. The heartbreaking and memorable beginning of the movie almost wasn't.
2. Young Ellie is voiced by the daughter of the film's director, Pete Docter — and her name is also Ellie.
3. It took three days to get to Angel Falls and Mount Roraima, the inspiration for Paradise Falls.
They took an airplane to another airplane, to a jeep, to a helicopter, back to a jeep, and then trekked out.