Eloise Mumford joins 'Fifty Shades' cast as Anastasia Steele's BFF

'Lone Star' actress Eloise Mumford will be playing Anastasia Steele's best friend and roommate in the film adaptation of the erotic novel 'Fifty Shades of Grey'.

Mumford, 27, will star as Kate Kavanaugh in the movie, People Magazine reported.

She will be joining lead actors Jamie Dornan and Dakota Johnson, who will star as Christian Grey and Steele respectively, in the film.