Cara Delevingne is set to star in a new film about Amanda Knox.

The British model has reportedly signed up for 'The Face of an Angel', based on the 2009 murder trial in which Amanda and her boyfriend, Raffaele Sollecito, were found guilty of killing British student Meredith Kercher, who was stabbed to death in the home she shared with the US student.

It is believed Cara won't play the lead role of Amanda - who was later set free after her conviction was overturned in 2011, but could again be convicted in a new trail which started this week - but will play a major role alongside Colin Firth, who is also tipped to star.

A source told The Daily Mirror: ''It doesn't look like Cara will be playing 'Foxy Knoxy' but she will have a major role, as the director wants to focus on events surrounding the trial and the people whose lives have been affected by it.''

The 21-year-old Burberry model has previously expressed her interest in acting after signing with Los Angeles based agency William Morris last month.

Cara already has three roles in the pipeline, including a film adaption of Martin Amis' novel 'London Fields', but 'The Face of an Angel' could kick start her Hollywood career.

The source continued: ''Getting Cara is a real coup for the film but is also brilliant for her career. It proves she's an in-demand actress and will help to boost her career in the US.

''She has been thinking about relocating there and, with big film offers coming in, it's looking likely movies will soon be Cara's main focus.''

Filming for 'The Face of an Angel' starts in Siena and Rome in Italy next month.