Arguably better known for her appearances in celebrity magazines than anything she's ever done onscreen, Sienna Miller's film career features such high-profile duds as 'Alfie' and 'Casanova'. However, having starred opposite Robert De Niro and Claire Danes in the upcoming 'Stardust', and worked with actor-director Steve Buscemi on his new film 'Interview', perhaps more memorable roles are to come. In the meantime we have 'Factory Girl', a biopic of doomed Andy Warhol starlet Edie Sedgwick which, while substandard, does show that Miller is a better actress than some are willing to give her credit for.

Beginning with socialite and heiress Sedgwick in therapy in 1970, the film rewinds back through her life in the 1960s – leaving college, travelling to New York, becoming a model, actress and It Girl and then losing her mind in a haze of drugs. Along the way we find out about Sedgwick's past and, through her relationships with Andy Warhol (Pearce) and singer Billy Quinn (Christensen), her desperate need to be loved.

At just under 90 minutes Hickenlooper's film is some way off a detailed examination of Sedgwick's life and, while it captures the era, you're left wondering why the same attention to detail wasn't paid to the script. As biopics go, it's dreary and rushed – this is no 'Ray' or 'Walk the Line'.

But while at the close you feel that you haven't bonded with Sedgwick or learnt enough about her, you're also impressed by Miller's performance. Making the best of what the script gives her, she captures the fragility, charm and naivety of Sedgwick and holds her own with Pearce's portrayal of Warhol.

No must see, but perhaps a turning point.

Harry Guerin