Petit Stuart

In 2009, Gergely Barki, an art researcher at Hungary's National Gallery, was watching the film with his daughter, and saw a painting on the wall in the background of the Little family's apartment. He recognized it as the long-lost work "Sleeping Lady with Black Vase" by Robert Bereny, which Barki had only ever seen as a black and white photograph from 1928. Barki hunted the painting through the studio, finding it had been purchased from an antique shop, by an assistant to the set designer for $500 to use in the film. She then purchased it from the studio once the production was completed. The painting was sold by the American owner to a collector. As of 2014, the painting was to be auctioned in Budapest, with a starting price of 110,000 euros (130,000 US dollars).

When Stuart is in the sewer, he gets wet. When he climbs out of the drain, he is dry again.

During the first portion of the end credits, George and Stuart are shown fooling around in Stuart's bedroom as Snowbell tries to catch Stuart. Snowbell goes as far as he can to catch Stuart to the point where he is launched out the side window and into a nearby dumpster.

Extra scenes not featured in the theatrical release:

• Upon arriving at the Little house, Stuart begins his tour in the kitchen and dining room, where the Littles prepare and eat "western omelettes, mashed potatoes, and all varieties of meatloaf." Included as a deleted scene on DVD and Blu-ray.
• Stuart crawls inside the piano to fix a stuck key. Mr. & Mrs. Little begin to sing "Heart And Soul," while Stuart performs a piano duet by striking the hammers from the inside. Restored for the ABC-TV broadcast.
• Later, Mr. Little decides to remove "Three Blind Mice" from the piano songbook. Mrs. Little gets the idea to invite the family for a party and to buy Stuart some new clothes. Restored for the ABC-TV broadcast.
• Following the party, the Littles begin to question their fitness as adoptive parents. Included on DVD and Blu-ray, and restored for the ABC-TV broadcast.
• In Stuart's bedroom, Snowbell spends a few quick moments antagonizing Stuart over George's outburst at the party. Restored for the ABC-TV broadcast.
• George wakes up remembering that Stuart has left to live with the Stouts, but thinks at first that it was only a dream. Included on DVD and Blu-ray, and restored for the ABC-TV broadcast.
• At the Stout home, Stuart proposes that they go on a family outing. Included on DVD and Blu-ray, though some of the CG work is unfinished.
• After arriving at the Little home, the detectives begin to question the Littles for the missing persons report. They get as far as asking Stuart's height and weight before realizing that he's a mouse. Included on DVD and Blu-ray, and restored for the ABC-TV broadcast.
• While at the police station, the Littles are shown some mouse lineups in hopes of identifying the Stouts. Included on DVD and Blu-ray, and restored for the ABC-TV broadcast.

Edited into Film de peur 5 (2013)