My opinion of Thatcher is such that I would never spend time or bucks to see a film about her. As for Streep's acting I would think her to be an excellent choice to play Thatcher! I find it rather strange to call her acting cold when she is portraying such a cold hearted bitch as a subject! To add a music twist to this thread Buck Owens had a big hit with a song called Act Naturally, and perhaps it could apply here as well!