The 2010 Disney animated musical featuring the song "I See the Light" is Tangled.
The song is performed during the film's famous lantern sequence, when Rapunzel and Flynn Rider watch hundreds of floating lanterns illuminate the night sky. The quiet duet marks a turning point in their relationship and expresses Rapunzel's growing independence, wonder, and romantic feelings.
"I See the Light" was written by composer Alan Menken and lyricist Glenn Slater. Mandy Moore and Zachary Levi recorded the film performances as Rapunzel and Flynn. The song was nominated for the Academy Award and Golden Globe for Best Original Song, and it later won a Grammy for Best Song Written for Visual Media.
Tangled is loosely based on the German fairy tale "Rapunzel," but Disney changes the story by giving Rapunzel a magical healing ability, a kingdom, and a roguish companion. It is sometimes confused with Frozen because both are Disney musicals, but Frozen's signature songs include "Let It Go," not "I See the Light."