 Streep 's first film of the 2010s was Phyllida Lloyd 's The Iron Lady ( 2011 ) , a British biographical film about Margaret Thatcher , which takes a look at the Prime Minister during the Falklands War and her years in retirement . Streep , who sat through a session at the House of Commons to observe British MPs in action in preparation for her role , called her casting " a daunting and exciting challenge . " While the film had a mixed reception , Streep 's performance got rave reviews , earning her Best Actress awards at the Golden Globes and the BAFTAs as well as her third win at the 84th Academy Awards . Former advisers , friends and family of Thatcher criticized Streep 's portrayal of her as inaccurate and biased . The following year , after Thatcher 's death , Streep issued a formal statement describing Thatcher 's " hard @-@ nosed fiscal measures " and " hands @-@ off approach to financial regulation , " while praising her " personal strength and grit . " 
