The former Dawson’s Creek star portrays the iconic actress in the forthcoming film and said she has heard that Marilyn is more than happy with the project.
'While we were filming, something came out in the National Enquirer that a psychic had spoken to her and that she approved of what we were doing and she thought I was doing a really good job,' Williams told E! Online.
'So maybe she likes it!”
But the 31-year-old admitted that she struggled to master Marilyn’s off-screen voice because there is next to no footage of her speaking in a normal situation.
Williams revealed: 'I studied tapes. There's really nothing that exists of her, that I could find anyway, that exists of her having a conversation with a friend.
'So there wasn't a template that existed for her everyday vocal pattern, so at a certain point you have to make it imaginatively.'