<P> A duel between Voldemort and Dumbledore ensues, destroying much of the Atrium, while Bellatrix escapes . After the two prove evenly matched, Voldemort possesses Harry to try to get Dumbledore to sacrifice Harry, but the love Harry feels for his friends and Sirius makes it impossible for Voldemort to remain in his body . Ministry officials arrive before Voldemort disapparates; Fudge is forced to admit that Voldemort has returned and is forced out of his position as Minister in disgrace . Umbridge is removed from Hogwarts and Dumbledore returns as headmaster . Dumbledore explains that he distanced himself from Harry throughout the year hoping it would lessen the risk of Voldemort using their connection . Harry comes to terms with the prophecy; "Neither can live while the other survives ." </P> <Ul> <Li> Daniel Radcliffe as Harry Potter, a 15 - year - old British wizard famous for surviving his parents' murder at the hands of Voldemort as an infant, who now enters his fifth year at Hogwarts School of Witchcraft and Wizardry . </Li> <Li> Rupert Grint as Ron Weasley, Harry's best friend at Hogwarts . </Li> <Li> Emma Watson as Hermione Granger, Harry's Muggle - born best friend and the brains of the trio . </Li> <Li> Helena Bonham Carter as Bellatrix Lestrange, one of Voldemort's most loyal Death Eaters and the cousin of Sirius Black . </Li> <Li> Robbie Coltrane as Rubeus Hagrid, the half - giant Gamekeeper and Care of Magical Creatures teacher at Hogwarts and a member of the Order of the Phoenix . </Li> <Li> Ralph Fiennes as Lord Voldemort, leader of the Death Eaters, a dark wizard intent on conquering the Wizarding World . </Li> <Li> Michael Gambon as Albus Dumbledore, the legendary Hogwarts headmaster and leader of the Order of the Phoenix . </Li> <Li> Brendan Gleeson as Mad - Eye Moody, Harry's ex-Defense Against the Dark Arts teacher and a member of the Order of the Phoenix . </Li> <Li> Richard Griffiths as Vernon Dursley, Harry's Muggle uncle . </Li> <Li> Jason Isaacs as Lucius Malfoy, a falsely pardoned senior Death Eater . </Li> <Li> Gary Oldman as Sirius Black, Harry's godfather and a member of the Order of the Phoenix . </Li> <Li> Alan Rickman as Severus Snape, the Potions teacher at Hogwarts and the Head of Slytherin </Li> <Li> Fiona Shaw as Petunia Dursley, Harry's Muggle aunt . </Li> <Li> Maggie Smith as Minerva McGonagall, the Transfiguration teacher at Hogwarts and a member of the Order of the Phoenix . </Li> <Li> Imelda Staunton as Dolores Umbridge, the new Defence Against the Dark Arts teacher and a plant from the corrupt Ministry of Magic . </Li> <Li> David Thewlis as Remus Lupin, Harry's ex-Defense Against the Dark Arts teacher and a member of the Order of the Phoenix . </Li> <Li> Emma Thompson as Sybill Trelawney, the Divination teacher at Hogwarts . </Li> <Li> Julie Walters as Molly Weasley, the Weasley matriarch and a mother figure to Harry, also a member of the Order of the Phoenix . </Li> </Ul> <Li> Daniel Radcliffe as Harry Potter, a 15 - year - old British wizard famous for surviving his parents' murder at the hands of Voldemort as an infant, who now enters his fifth year at Hogwarts School of Witchcraft and Wizardry . </Li> <Li> Rupert Grint as Ron Weasley, Harry's best friend at Hogwarts . </Li>

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