Amanda Knox

Attorneys for U.S. student Amanda Knox and her ex-boyfriend, who were found guilty of killing Knox's roommate in Italy, have demanded that Lifetime pull a planned film about their trial, The Associated Press reports.

Lawyers Carlo Dallo Vedova and Luca Maori said Saturday that they had sent letters to Lifetime warning that they would go to U.S. court to try to sequester the film if it isn't canceled and a trailer removed from the cable channel's website.

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Amanda Knox: Murder on Trial in Italy, starring Hayden Panettiere, is scheduled to air Monday, Feb. 21.

A&E Television Networks, which owns Lifetime, declined to comment.

Knox and ex-boyfriend Raffaele Sollecito were convicted in 2009 of sexually assaulting and murdering Meredith Kercher in the apartment she shared with Knox in Perugia, Italy. Kercher was stabbed to death on Nov. 1, 2007.

Knox and Sollecito were sentenced to 26 and 25 years in prison, respectively. Both deny the allegations and their appeals trial is under way.

The victim's father, Jon Kercher, has criticized the re-enactment scenes from the TV movie as "absolutely horrific." Sollecito's attorney, Maori, said the film presented scenes that were "beyond any logic."

The trailer was still on Lifetime's website Sunday afternoon.