The director of the new Star Wars film is offering fans the chance to appear in Episode VII.In a video recorded from the set in Abu Dhabi, JJ Abrams announced a new Unicef charity campaign run by Disney, Lucasfilm and Bad Robot, his own production company.Fans can donate $10 £6 or more to Star Wars: Force For Change in exchange for a chance to win the once-in-a-lifetime experience.

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