Michelle Williams won a best actress Golden Globe last night for her performance as Marilyn Monroe. In the film My Week With Marilyn, Williams plays the famous blonde bombshell with such conviction–acting, dancing, singing–that it’s reportedly leaving film goers spell bound.

Stark Insider was able to catch up earlier with director Simon Curtis at the Mill Valley Film Festival to discuss Michelle Williams’ electrifying performance, the legend that is Marilyn, and why the public’s enduring fascination with the star that once sang ‘Happy Birthday’ to President JFK:

Michelle Williams wins 2012 Golden Globe for best actress {Photo: Getty Images)

“She’s a once-in-a-lifetime movie star,” director Simon Curtis tells Loni before a special screening of the film at MVFF. “Above all, she was a sensational beauty.”

And on Williams:

“I really, really admire Michelle Williams. I think she’s a most magnificent actress, and was thrilled when she read the script and wanted to meet.”

“She didn’t let me down. She worked so hard, both at the body language externals of Marilyn and also the psychology and interior of Marilyn. It was a privilege every day to watch her work.”

In our review, Clinton Stark wrote about her performance, “it’s mesmerizing, deep. There is nary a happy birthday Mr. President to be heard.”

WATCH NOW: Stark Insider TV – My Week With Marilyn

Monica is the PR contact for Stark Insider, and helps with calendaring, coordinating SI video shoots, and assisting with inquiries. monica (at) starkinsider.com.