Dame Margaret Mary Beckett DBE PC MP (née Jackson; born 15 January 1943) is a British politician who has served as the Member of Parliament (MP) for Derby South since 1983. A member of the Labour Party, she became Britain's first female Foreign Secretary in 2006 and served in the Cabinet of Prime Minister Tony Blair throughout his tenure. Deputy Leader of the Opposition and Deputy Leader of the Labour Party from 1992 to 1994, Beckett briefly served as Leader of the Opposition and Acting Leader of the Labour Party following John Smith's death in 1994.