The Blue Butterfly (French: Le papillon bleu) is a 2004 Canadian biographical adventure drama film, directed by Léa Pool, produced by Porchlight Entertainment and Alliance Atlantis, distributed by Monterey Media and starring Marc Donato as Pete Carlton, a boy terminally ill with cancer, whose final wish is to find the elusive blue morpho butterfly.

William Hurt plays entomologist Alan Osborne, who takes him to the jungles of Costa Rica to find the insect.

His mother, Teresa, meets with Osborne, to try to get him to take her son to Costa Rica to find the rare blue morpho butterfly.

Pete is determined to find the "magical" butterfly so his cancer can be cured, which leads to them falling into a cavern, injuring Osborne badly.

Pete escapes to get help (recalling the earlier words of Mr. Osborne, "You run faster in the jungle without your pants") but it only leads to him being lost, suffering from hallucinations.