There is this troll/goblin movie and It has these troll/goblins taking over this kingdom and they some how flood it with the river and the princessis trying to escape and this boy is trying to gelp her escape and she has this ring that magically has a string attached to it that helps her escape. Can some one help me figure out the name of the movie?

The Princess and the Goblin (http://www.imdb.com/title/tt0107875/)

Thank you

You're welcome.