UPDATED AUGUST 03RD 2014: The cover was styled by Jillian Davison.
The 30 year old American actress is gracing the new cover of Glamour US photographed by Patrick Demarchelier. (source)
Click here to view last year cover featuring Jennifer Aniston, here to view 2012 cover featuring Victoria Beckham, here to 2011 cover with Rihanna, here for 2010 cover with Jennifer Lopez and here for 2009 cover with Jessica Simpson.