Marilyn was certainly NOT an airhead or the dumb blonde she often portrays. Considering everything she had going against her(illegitimate,poor,  orphaned,mollestation) She couldnt have achieved everything she did if she was not smart. She was mentally troubled thats a fact. We can get help for it now. But back then there was very little she could do. Im surprised she got to lived as long as she did. That took alot of guts. You see all these young stars today falling so quickly under the pressure. They couldnt last a day in her shoes.