Fiona Hill (formerly Cunningham, born c.1973) is a British political adviser. As of 2016, she is Joint Downing Street Chief of Staff, serving alongside Nick Timothy.
A former journalist who worked for Sky News and The Scotsman, Hill worked alongside Theresa May in the Home Office as a media adviser before resigning in 2014. Hill left government after being forced to resign as May's special adviser in a 2014 dispute with Michael Gove over alleged extremism in schools, which culminated in her releasing a confidential letter on May's website, prompting then Prime Minister, David Cameron, to insist that May sack her. In 2015, Hill became a Director of Lexington Communications, a lobbying firm. On 14 July 2016, following the resolution of the 2016 Conservative leadership election, Hill was appointed joint chief of staff to Theresa May, the day after May became Prime Minister.
Compared to Timothy, with whom Hill shares the Chief of Staff position, less is known about Hill's personal political views, as she has not written opinion articles as Timothy did from 2015-6. James Kirkup, who worked with Hill in journalism on The Scotsman, suggested "it's probably fair to say that Mrs May only talks about modern slavery [as a priority for government action] because of Ms Hill, and that’s not the only issue of which that is true."