Emma Watson in Marilyn Monroe film

My Week with Marilyn is an account of the week Marilyn Monroe spent in Britain in 1957 filming the Prince and the Showgirl with Laurence Olivier.

The BBC film stars Michelle Williams as the effervescent sexy Marilyn while Kenneth Branagh plays Olivier.

Emma Watson plays a wardrobe girl who loses the objects of her affections to the Hollywood star.

The Harry Potter star, who has just started back at Oxford University, has posted on her personal website Hope you all like My Week with Marilyn.

The 21-year-old will be playing her own age after more than a decade of playing the much younger Hermione in the Harry Potter films.