Arlene Isabel Foster (née Kelly) (b. 3 July 1970) is a British politician who has been the Member of the Legislative Assembly for Fermanagh and South Tyrone since 2003. She became Minister of the Environment in 2007 before becoming Minister for Enterprise, Trade and Investment in 2008. Foster briefly fulfilled the duties of Peter Robinson as acting First Minister of Northern Ireland from 11 January 2010 to 3 February 2010 while he took leave to deal with the Iris Robinson scandal.