Cameo code of silence frustrates Hollywood

May 24, 2007 Don't even think about spreading the word, nevermind including Mr. A-list in your theatrical marketing campaign. That's because celebrity cameos -- now more popular than ever in our increasingly self-referential pop culture -- are treated within the film industry with the kind of sensitivity reserved for matters of national security. The Legend of Ron Burgundy, or Ferrell returning the favor in Vaughn's Wedding Crashers.

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