Miley Cyrus began filming Hannah Montana at the age of 13. She didn't know the ways of Hollywood, but support from her family made it easier for the young star. During a recent interview with Variety, Miley opened up on Hannah Montana's success and how important it was for her father and grandmother to protect her on sets. Miley revealed that her dressing room was right next to Billy Ray Cyrus' dressing room. In fact, her grandmother Loretta "Mammie": Finley, would keep an eye on the kitchen.