Theresa Villiers, English lawyer and politician, Secretary of State for Northern Ireland

Dame Theresa Anne Villiers is a British politician who served as the Member of Parliament (MP) for Chipping Barnet from 2005 to 2024, having previously served as a Member of the European Parliament from 1999 to 2005. A member of the Conservative Party, Villiers was Minister of State for Rail and Aviation from 2010 to 2012, Secretary of State for Northern Ireland from 2012 to 2016 and Secretary of State for Environment, Food and Rural Affairs from 2019 to 2020.

The secretary of state for Northern Ireland, also referred to as Northern Ireland Secretary or SoSNI, is a secretary of state in the Government of the United Kingdom, with overall responsibility for the Northern Ireland Office. The officeholder is a member of the Cabinet of the United Kingdom. The incumbent secretary of state for Northern Ireland is Hilary Benn.