Michael Jackson fans are getting ready for the premiere of This Is It, the film showing the star rehearsing for the live shows which would never happen. Jackson, 50, died suddenly in June just weeks before he was due to launch a 50-date residency at the O2 in London. The new footage will be shown simultaneously in 15 cities when the film premieres at 0100 GMT on Wednesday. It has been described as "the single most brilliant piece of film-making" by Jackson's friend, Dame Elizabeth Taylor. Members of the Jackson family are expected to attend the Los Angeles premiere and footage will be screened to crowds outside the Odeon in London's Leicester Square. The guest list for the London screening includes Leona Lewis, JLS, Estelle, Peter Andre and the cast of the Jackson tribute show Thriller Live.