FILE - This is a Aug. 21, 1990 file photo on the then British Prime Minister Margaret Thatcher as she attends at press conference in London. Cinema chameleon Meryl Streep's latest challenge: becoming Margaret Thatcher the Iron Lady. Pathe Films said Thursday July 1, 2010 that the two-time Academy Award winner has expressed an interest in playing Margaret Thatcher in a new film about Britain's first female prime minister. (AP Photo, File)