Piglet's Big Movie is a 2003 American animated film produced by the DisneyToon Studios in Tokyo, Japan, and released by Walt Disney Pictures and Buena Vista Distribution on March 21, 2003. It is based upon the characters in the Winnie-the-Pooh books written by A. A. Milne. It is the second in a recent series of theatrically released Winnie-the-Pooh films, preceded by The Tigger Movie, released in 2000, and followed by Pooh's Heffalump Movie (2005). In the film, Piglet is ashamed of being small after believing that his friends belittle his presence—and wanders off into the Hundred Acre Woods—leading his friends in a search party to find him.
The three flashback sequences are the first adaptations of original A.A. Milne stories since The Many Adventures of Winnie the Pooh and Winnie the Pooh and a Day for Eeyore. Edited to make Piglet the hero of the stories and to conform to the characters' idiosyncrasies as Disney has portrayed them, they nevertheless retain much of Milne's original plot. In this movie, Pooh changes the name of Pooh Corner to Pooh and Piglet Corner, something that he was originally going to do, but the name did not sound small or much like a corner, which was in fact what it was. Besides the Carly Simon songs, Sherman Brothers music is also featured.