MILA Kunis is the front runner to play the lead role in the screen adaptation of hit erotic novel ’50 shades of grey’.

The ‘Black Swan’ actress has entered into negotiations to play the lead role of Anastasia Steele, according to reports.

Producers of the new movie were said to be a fan of the actress’ ‘girl next door’ charm.

The 29 year old is now the front runner to land the part – others who producers were believed to be considering were Harry Potter star Emma Watson and and Twilight actress Kristen Stewart.

Meanwhile producers are said to be at an advanced stage of choosing an actor to play the male lead in the movie – both Ryan Gosling and Ian Somerhalder are said to be in consideration.

Kunis was recently voted the sexiest woman alive - an achievement that wouldn't have gone unnoticed by producers.

The '50 shades of grey' book has become one of the highest selling fiction books of all time, shifting almost 10m copies in the UK and Ireland alone.