Mila Kunis wants to star in the big screen adaptation of Fifty Shades of Grey.

The 29-year-old Ted star, insists she would have a ''good time'' playing Anastasia Steele in the movie version of E.L. James' erotic novel, according to reports.

The Sun newspaper quotes Kunis as saying: ''There are times when you just want to do something fun and different, because you're going to have a good time doing it.''

It was confirmed last year that Kelly Marcel would pen the screenplay for Fifty Shades of Grey, while Michael De Luca and Dana Brunetti would co-produce.

EL James's novel has sold 65 million copies worldwide.