Herbert Smith Freehills is an international law firm with headquarters in London, United Kingdom and Sydney, Australia. It was formed on 1 October 2012 by a merger between the United Kingdom-based Herbert Smith, then a member of the "Silver Circle" of leading UK law firms, and Freehills, one of the "Big Six" Australian law firms. As of 2018, it is the 29th largest law firm in the world by revenue.