Is Michelle Williams the right choice to play Marilyn Monroe? She certainly looks the part and this trailer is our first look at whether she can pull off the voice too. My Week With Marilyn is based on Colin Clark’s diary account of being an assistant on The Prince and the Showgirl, the film that famously united Sir Laurence Olivier (played in the movie by Kenneth Branagh) and Marilyn Monroe, who was also on honeymoon with her new husband, the playwright Arthur Miller. After Miller left, Clark was tasked with showing Marilyn some of the pleasures of British life. The film is due out on November 18th and from this trailer looks surprisingly promising.