Michelle Williams plays the role of the much coveted star in 'My Week with Marilyn'.
'My Week with Marilyn' is an upcoming British drama film directed by Simon Curtis and written by Adrian Hodges.
It stars Michelle Williams, Kenneth Branagh, Eddie Redmayne, Dougray Scott, Judi Dench and Emma Watson.
Three months later, it was revealed that Williams was in talks for the role
The movie is based on two books by Colin Clark, it depicts the making of the 1957 film 'The Prince and the Showgirl', which starred Marilyn Monroe and Laurence Olivier.
The film focuses on the week in which Monroe spent time being escorted around Britain by Clark, after her husband, Arthur Miller, left the country.
Principal photography began on 4 October 2010 at Pinewood Studios.
Filming took place at Saltwood Castle, White Waltham Airfield and on locations in and around London.
Curtis also used the same studio in which Monroe shot 'The Prince and the Showgirl' in 1956.
'My Week with Marilyn' had its world premiere at the New York Film Festival on 9 October 2011.
It was also shown at the Mill Valley Film Festival two days later.
The film will be released in the United States on 23 November 2011 and on 25 November in the United Kingdom.
The story of the movie goes - In the summer of 1956, Colin Clark works as an assistant on the British set of 'The Prince and the Showgirl'.
The movie stars stars Laurence Olivier and Marilyn Monroe, who is also on honeymoon with her new husband, playwright Arthur Miller.
When Miller leaves the country, Clark introduces Monroe to British life and they spend a week together.
During this time she escapes from her Hollywood routine and the pressures of work.
The screenplay has been adapted and written by Adrian Hodges from the two books.
The film is directed by Simon Curtis and it is his feature debut.
David Parfitt produced the film, which was financed by The Weinstein Company and BBC Films.
In August 2009, Scarlett Johansson became the frontrunner to play Marilyn Monroe in the film.
Kate Hudson, Amy Adams and Michelle Williams were also named as potential candidates for Monroe.
Williams was the only actress that producers met with during casting, despite the other actresses being considered for the role.
The actress then spent six months reading biographies, diaries, letters, poems, and notes about and from Monroe.
She also looked at photographs, watched her films and listened to recordings.
Williams had to gain weight for the role and she worked with a choreographer to help perfect Monroe's walk.
Desplat wrote a piece of music for My Week With Marilyn titled 'Marilyn's Theme', which Pope adapted into his score.
Harry Potter actress Emma Watson has been cast in the small role of wardrobe assistant, Lucy.
Judi Dench plays Sybil Thorndike in the movie.
Judi Dench filmed her scenes in September 2010 as she had to go to India to begin work on another project.
The film's original score was composed by American film composer and orchestrator, Conrad Pope, and French film composer, Alexandre Desplat.
Dougray Scott plays the role of Arthur Miller in the movie.