Mark Hamill, Carrie Fisher and Harrison Ford speak onstage during the 33rd AFI Life Achievement Award tribute to George Lucas at the Kodak Theatre on June 9, 2005 in Hollywood, Oops! George Lucas may have just stolen the thunder from his lead stars. The Star Wars creator accidentally revealed in an interview with Bloomberg Businessweek that Harrison Ford (Han Solo), Carrie Fisher (Princess Leia) and Mark Hamill (Luke Skywalker) have already signed on for Star Wars: Episode VII. "We had already signed Mark and Carrie and Harrison -- or we were pretty much in final stages of negotiation. So I called them to say, 'Look, this is what's going on,'" Lucas, 68, said of Disney buying Lucasfilm, and planning to release Star Wars: Episode VII in 2015. "Maybe I'm not supposed to say that," he added. "I think they want to announce that with some big whoop-de-do, but we were negotiating with them." Lucas teased, "I won't say whether the