Miley Cyrus has cast doubt on whether she will return for another series of Hannah Montana.

The singer/actress is currently filming the third season of the Disney show and would like to feature in a fourth run.

But the 15-year-old has revealed she is focusing on wrapping series three, which is due to hit U.S. TV screens next month, before deciding on whether to continue with the hit franchise.

She says, "Hopefully I'm going to go into season four, but we're not sure so right now we're just getting through season three."

Cyrus has also filmed Hannah Montana: The Movie, which is slated for release next year.