Seriously, the best movie I've seen in a long time. Based on Neil Gaiman's children's novel, it's about a girl who thinks her life is extremely dull, and wishes things were different. As the saying goes, be careful of what you wish.
Cartoonist extraordinaire Vera Brosgol worked on the storyboarding for the movie.
Go see it in 3D if you can. It doesn't try to be "in your face" about it.
And the soundtrack is really quite lovely. The film's website is pretty fun, too!