COVER STORY: How Miley & Billy Ray Stay Grounded
"The biggest phenomenon in all this is that the kid's been able to keep her head on her shoulders," says her dad and Hannah costar, country singer Billy Ray Cyrus, 45.
What's the secret? Well, there's homework (Miley's public school lets her study on set and come in for exams on Fridays) and chores, such as loading the dishwasher every night.
And every Sunday Miley must attend church with the rest of the family, which includes Braison, 13, Noah, 7, and mom Leticia's kids from a previous relationship, Brandi, 20, and Trace, 18.
Then there are Mom's magazine-wielding lectures about the missteps of young Hollywood. "It is so scary as a mom to see all these kids who are so whacked now," says Leticia, who's called Tish.
If Mom is the family's disciplinarian, Dad is the confidant. "We're really close," says Miley. "I feel like I can tell my dad anything. When we come home, we forget that we even work together and just hang out."
For more on life at home with the Cyrus family, including what Billy Ray thinks about Miley's boyfriend and why Miley isn't allowed to have a credit card, check out the new issue of PEOPLE, on newsstands Friday. Plus: check out TEEN PEOPLE's Summer music gallery, featuring Miley Cyrus.