Amanda Knox and and her ex-boyfriend, Raffaele Sollecito, are appealing their convictions for the 2007 murder of British student Meredith Kercher.
A third person, Rudy Guede, was also convicted of Kercher's murder in Perugia, Italy, but in a separate trial.
See below for a guide to who's who in the case, after four years of legal wrangling: