Updated 21 February 2003, 17.39

Gary Oldman will be Sirius Black

As widely rumoured, the key role of Sirius Black will be played by Gary Oldman.

And Timothy Spall will bringing Peter Pettigrew to life.

All three are well-known British actors who've starred in many films and TV shows.

They join David Thewlis - confirmed as Remus Lupin in January - and Daniel Radcliffe, Rupert Grint and Emma Watson from the first two films.

What about Cho Chang?

Fast Show fave Paul Whitehouse has scooped a minor role too. He plays a knight from one of the paintings Sir Cadogan.

At the moment there is no news on Cho Chang, but some other Hogwarts students have been cast and will be revealed soon.

Pre-production filming has already started

And all these new cast members will be on the set soon, with filming starting for real on Monday 24 February.

As we've already reported, the film crew have been working on pre-production filming, getting special bits and pieces underway.

But on Monday what's called 'principal photography' starts, involving the major members of the cast.

And we'll keep you updated on filming with news and exclusives, so don't forget to keep coming back here to check it out!

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	Potter fan snaps Azkaban film set
	Cho Chang rumours for Potter 3 'aren't true'
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