What will happen to tweets of Demi Moore's bottom

The crackdown on twitter continues as Hollywood film studios are now stopping their actors from using the social media service.

In accordance with the industry's long tradition of keeping its biggest names on a tight leash, Disney and DreamWorks have both decided that the "talent" needs to be kept under close control online. Both studios have inserted clauses into employment contracts to stop stars sharing personal thoughts that might interfere with their carefully-honed public images. reports the Independent

Although as they add

Quite how this will affect Ashton Kutcher's ability to "tweet" photographs of wife Demi Moore's bottom remains to be seen: