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Harry Potter and friends are back for The Prisoner of Azkaban, the third film in the series by JK Rowling, which comes out in the UK on Monday.

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Sir Michael Gambon has taken over the role of Dumbledore, which was previously played by the late Richard Harris.

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Weird things take place at Harry's House in Privet Drive, when his Aunt Marge is inflated.

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The teenagers are plagued by the deadly Dementors, which try to suck the life out of their souls.

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The Knight bus, which takes Harry to safety, has a talking shrunken head voiced by Lenny Henry.

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Hagrid, played by Robbie Coltrane, towers over his fellow cast members.

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Dame Maggie Smith reprises her role as Professor McGonagall, one of the students' teachers.

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Peter Pettigrew [Timothy Spall] is a rodent-like ally of Lord Voldemort.

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The students of Hogwarts are now attending the school for their third year of learning about the art of magic.

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Emma Thompson makes her Potter debut as myopic Divination Professor Sybill Trelawney.

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Hermione [Emma Watson] takes on the dastardly Draco Malfoy [Tom Felton] in the film.

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The enigmatic Sirius Black, the prisoner of Azkaban, is played by Gary Oldman.