Rosie Not Returning For TF4

Rosie Huntington-Whiteley, who plays Carly, tweeted that she most likely will not return for the 4th installment of Transformers.

"I loved to be part of the "Transformers 3" film, but I don't think I will return for Transformers 4...."

This is understandable as TF4 will be something totally new, therefor it will have a brand new cast. But the key words here are "I think". So it is not officially confirmed whether or not Rosie will be back.