The film opens with Eleanor and Frederick Little (Geena Davis and Hugh Laurie) and their son George (Jonathan Lipnicki) on the day they are intending an adoption. George wants to go to the orphanage with them, but he has to go to school. While he is at school, his parents go to the orphanage where, among all the kids there, they fall in love with a thoughtful, observant mouse named Stuart (voiced by Michael J. Fox), who knows almost everything about the other children, having been there for a long time. Despite the warnings of Mrs. Keeper (the woman in charge), who says that humans should not be adopting mice, they decide to adopt him as their second son.Immediately after getting home, Stuart meets Snowbell (voiced by Nathan Lane) the family cat, who immediately attempts to eat him. George arrives home and is surprised when his parents introduce Stuart as his new brother. He thinks it is a joke at first, but is shocked when he realizes they are being serious. That night, Snowbell visits Stuart and requests that he keep a low profile, so as to avoid getting seen by the other cats and damaging Snowbell's image (the alley cats would laugh forever if they heard that there was a mouse with a pet cat).George is at first sullen and somewhat disappointed and treats Stuart with contempt. He eventually snaps at a family gathering when they encourage him to play "catch" with him. He also earns Snowbell's wrath when his friend, Monty the Mouth (voiced by Steve Zahn) visits for food. As Snowbell tries to keep him from seeing Stuart, he makes a scene trying to get a cereal box from a cupboard. When he sees him and discovers he is a member of the family, Monty cannot contain himself. Enraged, Snowbell tries to kill him, who narrowly escapes by fleeing into the basement. Here, he learns that George keeps a playroom and the two interact and eventually, George comes to accept him as his brother. He also finds that George keeps a toy car just his size. They decide to work together to finish George's homemade model boat, the Wasp, for the Central Park Boat Race the following week.Snowbell, however, isn't finished. He and Monty head to an alley that night to visit Smokey (voiced by Chazz Palminteri), a Mafia Don-like Russian Blue who is the leader of the alley cats. Since Snowbell doesn't want Stuart killed, he makes a plan with the alley cats to remove him from the Littles' house. On the day of the 92nd annual Central Park Boat Race, the Wasp is finished, and they arrive at Central Park. But, George finds a problem when he discovers his nemesis, Anton, is there. At the same time, Stuart accidentally destroys George's remote control, rendering his boat inoperable. To make up for this, he takes control of it himself. Anton, however, attempts to cheat by ramming his much larger boat into other ones and sinking them. When he attempts to do the same thing to the Wasp, Stuart manages to bite into the line of his sail, rendering Anton's boat inoperable. He subsequently wins the race.Screenshoots :
