Jonathan Lipnicki, nine, isn't afraid of mice, especially not Stuart Little! Stuart is his co-star in the new film Stuart Little, which comes out December 17. It's a tale about a family that adopts a mouse and treats him as if he were a real boy. Jonathan plays George, the serious older brother.

Stuart looks real on screen, but he was actually made with computers. During filming, the movie's director gave Jonathan a real mouse to keep. Jonathan named him Stuart. There was just one problem. "On Halloween, I found two babies!" says Jonathan. The mouse's new name? Stuette!