She is Rosie Huntington-Whiteley.
It was revealed yesterday that she is gonna replace Megan Fox in Transformer 3..
If you have seen the Pirelli 2010 Calender, you should have already seen her. *wink!*
Oh, she also modeled for Abercrombie & Fitch, DKNY, Ralph Lauren, Top Shop, Burberry's, Victoria's Secret and much more.