Reports continue to fly about Miley Cyrus' less than professional conduct on the set of Hannah Montana.

Days after the not-so-squeaky clean starlet defended her honour over rumours she's embroiled in a battle of wills with Disney bosses, tensions have supposedly never been higher on the set of the hit show.

And father Billy Ray is said to be adding fuel to the fire with his own seriously bad attitude.

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."

Back over to you Miley?...

See Miley's transformation from sweet to scandalous here.