Lawyers for Michelle Carter, who was convicted of involuntary manslaughter after sending texts that convinced her boyfriend to commit suicide, filed a notice to appeal.
The notice was filed Wednesday in Bristol County Juvenile Court.
Carter was convicted in June by a judge who said her final instruction to 18-year-old Conrad Roy III caused his death.
Carter, now 20, was 17 when Roy was found dead of carbon monoxide poisoning in July 2014.
In dozens of messages, Carter urged Roy to follow through on his talk of taking his own life. "The time is right and you are ready ... just do it babe," Carter wrote in a text the day he killed himself.
Carter was sentenced to 15 months behind bars. The judge granted a stay in her incarceration while her appeals move through the Massachusetts' appellate system. During the stay, the rules of Carter's probation will apply.
Carter and Roy met in Florida in 2012 while both were on vacation with their families. After that, they only met in person a handful of times. Their relationship consisted mainly of texting.