By Lizo Mzimba
CBBC Newsround
The first movie was the biggest film of last year, so this one has a lot to live up to. So does it deliver? The answer's a definite yes.
Everything has moved up a step from Philosopher's Stone - the children's performances, the action and crucially the special effects.
Fantastic effects
The storyline follows Harry at school in his second year, where something strange and sinister is stalking the halls of Hogwarts, attacking students so that it seems they've been turned to stone.
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