according to celebritystyleguide serena's coat is nanette lepore http://www.shopbop.com/party-girl-coat-nanette-lepore/vp/v=1/845524441852232.htm?folderID=2534374302080999&fm=browse-brand-shopbysize it's the party girl coat and available in forest green colour only! p.s please check my collection it's full of g.g sets with exact pieces and similar items to the ones they wear http://www.polyvore.com/gossip_girl_inspired/collection?id=320474