In the diary, Clark talks about showing Marilyn around Queen Elizabeth's private apartments at Windsor Castle and other "behind-the-scenes" trips. Clark published excerpts of his diary in 1958, but left the details of one week out. These chapters weren't released until he died in 2002, and will form the basis of the movie.
Other actresses reportedly considered for the role include Kate Hudson, Amy Adams, and Michelle Williams. Between those three and Johansson, I'd say Johansson comes closest in the looks department, but none of these ladies seems quite right for portraying the sexy icon. Who, if anyone, could you see playing Marilyn Monroe on the big screen?