Flushed Away (2006)

Pet rat Roddy (Hugh Jackman) is living with a well-to-do family. When his family goes on vacation, he has his home invaded by a lower class street rat, who flushes him down the toilet and into an underground sewer rat society that is very different from what he is used to. While trying to find his way home, he has several adventures. He meets a gorgeous female rat on the run from the sewer mob who stole a jewel from her father and her poor family, has high-speed chase adventures on her ship and saves the sewer society from an evil bad guy who wants to kill everyone. The experiences teach Roddy about the importance of love and friendship versus wealth and status.