Amanda Knox's lawyers say they make take action over a new film based around the events of Meredith Kercher's murder in Perugia in 2007, if it is "damaging to her image".

The Face of an Angel is based on a book about the infamous murder case written by CNN journalist Barbie Latza Nadeau and apparently comes with the blessing of Kercher's family; Meredith's brother Lyle has watched it.

"We dedicate the film at the end 'In Memory of Meredith Kercher', I didn't want to do that unless someone from her family had seen it," said director Michael Winterbottom.

The drama, starring Kate Beckinsale and Cara Delevingne, drew mixed reaction as it premiered at Toronto Film Festival this weekend.

A Guardian review praised the way in which it depicted how the media frenzy surrounding the trial "helped turn a grisly stabbing into a long-running soap opera".

But the Mail reported that lawyers for 27-year-old Knox may sue if the film casts her in a negative light, as her trial for the 2007 murder is still ongoing.

Amanda Knox lawyers threaten to sue over controversial new film based on Meredith Kercher's murder