Remember Amanda Knox?
She is the American college student who was cleared of murder charges in Italy but today, she will find out if she faces a retrial.
Knox and her ex-boyfriend were convicted for murdering her roommate.
They spent four years in jail, but were set free in 2011.
Today, prosecutors in Rome are asking a court to overturn the acquittal. If that happens, it is unlikely the US would extradite her.