President-elect Barack Obama's two young daughters have been invited to appear on popular kids television show Hannah Montana.

Singer Billy Ray Cyrus, the father of Hannah Montana star Miley Cyrus and also an actor on the hit Disney Channel show, said the show had asked Malia and Sasha Obama to take part in an episode.

Cyrus said: "They probably will. The invitation is there. You know the Hannah Montana film comes out in April. Maybe something might happen around then."

Pressed for details, Cyrus said: "I can't, I can't. I have got to keep a secret."

Hannah Montana, in which Miley Cyrus plays a school girl with a secret life as a pop-star, is one of the most popular kids television series in the US with a huge audience and merchandising empire worth about $1 billion (£643 million).

Obama has said in interviews that Malia is a big fan of Hannah Montana, but the Obamas have shielded the girls from the media and it remains to be seen whether they will want their daughters to take part in the show.

Miley Cyrus, who turns 16 later this month, said she did not know for certain if the offer had gone out, but she added: "I think that would be really cool and if anything, have them visit the set."

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