An Italian court has re-convicted Amanda Knox for slander years after she was acquitted of killing her British roommate Meredith Kercher more than a decade ago.

The court says Knox had wrongly accused an innocent man of the brutal murder, the Associated Press reported.

She had fingered the Congolese owner of the bar where she worked part-time as the exchange student's 2007 killer.

The judge will not send Knox to prison for the new conviction due to the time she already served for the murder for which she was originally convicted.

She was convicted of slander at the same time as her original conviction for blaming the murder bar owner Patrick Lumumba during police interrogation, the BBC reported.

Knox's lawyers plan to appeal the latest verdict.

Knox had returned to Italy for only the second time since she was freed in 2011.

She didn't show any emotion as the verdict was announced but her lawyer said, "Amanda is very embittered."

Knox said that she hoped to "clear my name once and for all of the false charges against me. Wish me luck" before the hearing.