The Secret World of Arrietty

Kari-gurashi no Arietti is a movie starring Bridgit Mendler, Amy Poehler, and Will Arnett. The Clock family are four-inch-tall people who live anonymously in another family's residence, borrowing simple items to make their home....
14-year-old Arrietty and the rest of the Clock family live in peaceful anonymity as they make their own home from items "borrowed" from the house's human inhabitants. However, life changes for the Clocks when a human boy discovers Arrietty.