Naomi Watts has revealed that she's extremely scared about playing Marilyn Monroe in a new biopic.The actress is set to play the iconic screen siren in an adaptation of Andrew Dominik''s ''Blonde'' and she admitted the nerves about the part are getting to her."It''s a huge pressure. We all feel we know her. I''m very, very scared about that," Contactmusic quoted her as saying.Watts is not the only star to be portraying Marilyn in a movie about her life - Michelle Williams is also set to play her in ''My Week With Marilyn''.
