ellefanning3.jpgmarcjacobselle460newer.jpgMarc Jacobs

Elle Fanning may only be 13-years-old, but the Super 8 starlet is looking super grown up in the Marc by Marc Jacobs Fall 2011 campaign.

A full length fur coat, granny socks and wool pants ... not exactly an ensemble most teenagers enjoy wearing. Elle's 18-year-old sister Dakota posed for the fashionisto's recent perfume campaign.

See Dakota's photo ... after the jump.