Step 1, Be sure you meet the age requirements. You must be at least 18 years old to audition to be a Disney princess. Because Disney wants their princesses to look youthful, most aren’t older than 27.[1]Step 2, Check if you meet the height and size standards. Generally, Disney requires that princesses be between 5’4” and 5’7”. This is done for reasons of costume fit and uniformity. After all, if there are ten Cinderellas throughout the park on a given day, they shouldn ...