Harry Potter (film series) to be re-cast for the third instalment, "Harry Potter and the Prisoner of Azkaban". David Heyman and director Alfonso Cuarón chose Michael Gambon to portray the character of Dumbledore, which he did for all succeeding films. Notable recurring cast members include Helena Bonham Carter as Bellatrix Lestrange, Warwick Davis as Filius Flitwick, Ralph Fiennes as Lord Voldemort, Brendan Gleeson as Alastor Moody, Richard Griffiths as Vernon Dursley, Jason Isaacs as Lucius Malfoy, Gary Oldman as Sirius Black, Fiona Shaw as Petunia Dursley, Timothy Spall as Peter Pettigrew, David Thewlis as Remus Lupin, Emma Thompson as Sybill Trelawney, Mark Williams as
Harry Potter fandom set up with 3D virtual chatrooms and avatars where fans can socially interact with each other in Pictionary and Harry Potter Trivial games or participate in discussion groups about Harry Potter or Film media or perform plays as a theater group to other fans as audience. They hold special community event such as Harry Potters Birthday or Halloween and have seasonal house competitions. Fans are able to create their own avatars, collect or be rewarded coins to purchase furniture items for their own "clubhouse". However, the website emphasizes more social interaction between fans' avatars to stimulate the Hogwarts student experience.