Cameron Diaz is due to make the next film in the superhit 'Shrek' franchise for Dreamworks Studio.Studio bosses think that Twitter addicted stars are damaging the industry by leaking information on the site, which has more than 2 billion followers around the globe, reported 'Sun' online.
To deter the actors, studios are now inserting clauses in their contracts forbidding the use of such networking sites.
Stars affected include Cameron Diaz and Mike Myers, who are due to make the next film in the superhit 'Shrek' franchise, next year for Dreamworks Studio.
The move comes after American Idol judge Paula Abdul dramatically resigned this year on Twitter, while 'Transformers' star Megan Fox was branded "dumb as a rock" in a cyberspace row.
