Brendan Fraser's personal trainer for the film sued Fraser for not mentioning him in the credits. The trainer did not win the case.
Almost every element from the George of the Jungle (1967) cartoon series is included in this movie... even the "Never argue with the Narrator" line that shows up in Jay Ward's cartoons.
It was after seeing this film that director Stephen Sommers considered Brendan Fraser for the role of Rick O'Connell in The Mummy (1999).
During a 2019 interview on Busy Tonight (2018), co-star Leslie Mann confessed that she developed a real-life crush on Brendan Fraser during filming and ultimately fell in love with him. She was then surprised by Brendan, hiding on set.
The ground in the jungle was made out of mashed potatoes.