Gwen Stefani has rubbished reports she's set to join Sienna Miller in the upcoming movie Factory Girl.

Gwen Stefani has joined the cast of 'Factory Girl'.

Pop queen Gwen Stefani is hitting the big screen alongside Sienna Miller in forthcoming movie Factory Girl.

Sienna Miller is to play Andy Warhol’s drug-addicted muse Edie Sedgwick in new movie Factory Girl, it was revealed today.

Actress Katie Holmes is set to play Andy Warhol’s drug-addicted muse Edie Sedgwick in new movie Factory Girl, it emerged today.