Kelly Brook will appear in horror movie Piranha 3D

BUSTY Melbourne-bound Kelly Brook is about to show off her "acting" skills on the big screen.

The UK pin-up girl, who is moving Down Under this year with her rugby union-playing boyfriend, Danny Cipriani , is set to appear in horror flick Piranha 3D.

The movie hardly sounds like something people will be camping out to see.

And it also does not sound like the role has tested Brook's acting skills.

"The movie is all about the girls. We weren't trying to make another Avatar," a source told The Sun in London.

Director Alexandre Aja was convinced movie fans wanted to see "T and A".

"There are a lot of 3D boobs," he said.

The trash-tastic film features a wet T-shirt contest and a 25-minute piranha massacre.

Kelly's Ultimo video....