The Tale of Despereaux (2008)

Tiny and graced with oversized ears, Despereaux was born too big for his little world. Refusing to live his life cowering, he befriends a Princess named Pea and learns to read (rather than eat) books -- reveling in stories of knights, dragons and fair maidens. Banished from Mouseworld for being more man than mouse, Despereaux is rescued by another outcast, Roscuro, who also wants to hear the tales. But when the Princess dismisses Roscuro's friendship, he becomes the ultimate rat and plots revenge with fellow outsider Mig. After Pea is kidnapped, Despereaux discovers he is the only one who can rescue her...and that even the tiniest mouse can find the courage of a knight in shining armor.