UPDATED JANUARY 06TH 2015: Added the subscriber cover.
The Girls star is wearing Saint Laurent Spring Summer 2015 polkadot dress and leather jacket on the latest cover of Elle US, photographed and styled by Paola Kudacki and Samira Nasr respectively. (source)
Click here to view last year cover featuring Zooey Deschanel, here to view 2012 cover featuring Claire Danes, here to view last year covers featuring Reese Witherspoon, here for 2011 cover with Katie Holmes, and here for 2010 cover with Jennifer Lopez.