Miley Cyrus and her father, Billy Ray Cyrus, are said to be "exhibiting major attitude" on the Hannah Montana set.

Miley Cyrus "exhibiting major attitude" on the Hannah Montana set?

A source tells the Chicago Sun Times newspaper, "Both Miley and Billy Ray have been exhibiting major attitude. The rudest thing has been their total lack of consideration for all of us who work on the show.

"But beyond showing up horribly late for rehearsals and tapings, they've been incredibly unkind to Miley's key cast members.

"Things are so chilly between Emily [Osment] and Miley, icicles form every time they have to speak to one another.

"It's become increasingly clear Miley has become jealous of Emily's rising profile and popularity."

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