Miley Cyrus and boyfriend Justin Gaston visit Stephen Baldwin at his book signing at the Lifeway Christian Store in Franklin, Tennessee on Monday.

Barack Obama‘s two young daughters, Malia, 10, and Sasha Obama, 7, have been invited to appear on Hannah Montana and could take part in an episode in April.

“They probably will. The invitation is there,” Billy Ray Cyrus told Access Hollywood in an interview. “You know the Hannah Montana film comes out in April. Maybe something might happen around then.” Asked for details, Cyrus said, “I can’t, I can’t. I have got to keep a secret.”