To be a character at the parks, you must go through the audition process. Check out the audition calendar at DisneyAuditions.com to find your nearest audition. Look for the auditions that say Female Character Look-Alike and this usually means they are looking for princesses. At the audition you will learn a simple dance routine, and if you progress past the dance, you will get a chance to read a script, do some improv and an interview. It can be a very lengthy process, but Disney casting directors are keen on finding the best girls to fit the roles.