Naomi Watts is "very, very scared" about playing Marilyn Monroe
The actress - who recently became attached to Clint Eastwood`s forthcoming movie `J. Edgar` in the role as his secretary Helen Gandy - is set to play the iconic screen siren in an adaptation of Andrew Dominik`s `Blonde` and she admits the nerves about the part are getting to her.
She said: "It`s a huge pressure. We all feel we know her. I`m very, very scared about that."
It is not the only movie role she is nervous about - she also felt "daunted" to be playing real life CIA agent Valerie Plame - whose cover was busted by the White House when her husband wrote an anti-Bush editorial piece - in `Fair Game`.
Asked about her feelings she said: "Daunting. I`m a lot more fragile than she is. To me, she seems almost invincible."
Naomi 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`, and she too admits to feeling overawed by the project.
She previously said: "I feel like we live together. At a certain point something else does take over. I don`t quite feel myself these days."