Mark James Littlewood (born 28 April 1972) is the director general of the libertarian, free market Institute of Economic Affairs (IEA) think tank. He was formerly the chief press spokesman for the Liberal Democrats and the Pro-Euro Conservative Party and was an advisor to the Conservative Party under Prime Minister David Cameron. Having previously been in favour of deeper European integration, Littlewood later adopted a eurosceptic position and advocated voting Leave in the 2016 referendum on Membership of the European Union.