The pictures are a first chance for fans to see Sirius Black, Remus Lupin and the new actor playing Professor Albus Dumbledore.
He's called Sir Michael Gambon, and takes over from actor Richard Harris who died after playing Dumbledore in the first two films.
The pictures also show a bit more of the film's new look, with Harry, Ron and Hermione all looking a lot older than in the first two films.
Their clothes all look a bit cooler too, apart from Ron, who doesn't seem able to escape those woolly jumpers his mum keeps sending him for Christmas.
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