Once upon a time, Shrek rescued Princess Fiona and became an unlikely Prince Charming. The big ogre will again turn the world of fairy tales upside down. In Shrek 2, he and Fiona travel to the ritzy Kingdom of Far Far Away. There, the real Prince Charming and Puss in Boots make life difficult for Shrek and Fiona. Will they live happily ever after? Find out when the movie opens on May 21.