Star Wars actors Mark Hamill and Ian McDiarmid are joining fans of the sci-fi trilogy at a London show which marks 30 years since the movie's release. The three day event (13-15Jul07) at London's ExCeL conference centre will feature a storm trooper procession and a Jedi training set. Thousands of fans are expected to flock to the British capital in the first official Star Wars event to ever take place outside of America.